Government Contracting

This is a self-paced online web course. Participation is 100% online. This course is organized and produced by Blockchain Educators. Our meetup group is collaborating by promoting this online course. Course Preview Video: https://bit.ly/38py6FX (Youtube) (Original Price: $299) Discounted Course Price: $97 Register Here: https://blockchaineducators.thinkific.com/courses/blockchain-user-certification?ref=7ca562 Blockchain Educators is providing their online Blockchain User Certification course (originally priced at $299) now for only $97! This course is perfect for anyone who wants to learn blockchain and to certify their knowledge of Blockchain. No technical experience is necessary to take this course! This course covers blockchain from A to Z and instruction is all done via a self-paced online platform. The course never expires. You can pause, rewind and fast forward. At the completion of the course you will take an exam online. When you pass the exam you will be awarded a certificate and badge that can be shared on your LinkedIn profile or on your resume/ CV. This credential will document and verify your expertise in blockchain and will help you find employment in the growing blockchain industry! Learn from home, self paced! Gain a marketable credential ASAP! Hurry! Student Review: "Excellent introduction class to blockchain concepts and technology. The depth and breadth of the course challenged this beginner to understand the fundamentals of the technology, the challenges, and the current state of affairs. The testing was comprehensive and thoughtful." By: Vasudha Badri-Paul CEO at Rype Creative Have questions about the course? Contact: Admin@BlockchainEducators.org Course Syllabus: Introduction What is Blockchain Blockchain Glossary We provide 64 technical terms and definitions that relate to blockchain technology. Why is Blockchain a revolutionary Technology Blockchain Applications by Industry Blockchain Transaction Model Bitcoin & Blockchain: how are they connected What is a Cryptocurrency Bitcoin: A Peer to Peer Electronic Cash System Benefits of using Blockchain Technology Consensus Consensus Protocol Safety Liveness Fault Tolerance Blockchain Fork Consensus Failure Dominance Cheating Poor Performance Choosing the right blockchain What is Cryptography Cryptographic encryption Elliptic-curve Cryptography (ECC) What is Blockchain Mining (Bitcoin Examples) The Computationally-Difficult Program The Difficulty Metric Block Reward Hardware Blockchain Business Use Cases Private vs. Public Blockchain Permissionless vs. Permissioned What is Ethereum Proof of Work Solidity Homestead EthHash Ethereum Virtual Machine (EVM) Serenity (POS) What is Microsoft Azure Workbench Blockchain What is Hyperledger Hyperledger Fabric The Practical Byzantine Fault Tolerance (PBFT) SIEVE Cross-Fault Tolerance (XFT) Hyperledger SawtoothLake Proof of Elapsed Time Hyperledger Iroha Hyperledger Burrow What is Ripple & Stellar Blockchain Ripple Consensus Protocol Algorithm Stellar Consensus Protocol Algorithm What is a Smart contract What is Proof of Stake What is the EOS blockchain Proof of Stake EOS Vs. Ethereum Denial of Service Attacks Consensus Mechanism & Governance What is Bitshares Blockchain & DEX Delegated Proof of Stake (DPOS) Transaction Confirmation Proof of Stake Consensus Block Production by Elected Witnesses Parameter Change by Elected Delegates Changing the Rules (aka Hard Forks) Double Spend Attack Transactions as Proof of Stake Blockchain Reorganizations Maximally Decentralized NEM Blockchain Review AI / Quantum computing and Blockchain This is a six hour intensive course covering blockchain from A to Z Perfect for beginners, entrepreneurs, business leaders and blockchain enthusiast!

**Xuling Ancient Trail** Nestled in the picturesque Jiande City of Zhejiang Province, the **Xuling Ancient Trail** offers a perfect escape into nature and history. This centuries-old stone-paved path winds through lush bamboo forests, terraced fields, and traditional villages, showcasing the serene beauty of the Jiangnan countryside. **Highlights of the Trail:** * **Scenic Views**: Hike through rolling hills adorned with seasonal blooms—rapeseed flowers in spring, verdant greens in summer, golden hues in autumn, and tranquil mist in winter. * **Cultural Heritage**: Walk along the same historic route used by locals for trade and travel, with well-preserved sections of stone steps and occasional ancient pavilions. * **Village Charm**: Pass by quaint villages like Xulingcun, where you can experience rural life and enjoy local hospitality. * **Trip Information** **Date:** MAR 18TH Wednesday **Meetup** 7:00 at Exit 6 of Line 1/4 Shanghai INDOOR Stadium Metro Station **Transportation:** Private Car or Bus **Difficulty:** Easy hiking - about 8km **Accommodation:** No **Itinerary** **D1 MAR 18TH WEDNESDAY** Meetup at Exit 6 of Line 1/4 Shanghai INDOOR Stadium metro station -> Departure time: 07:00 [Please be there 5-10 mins earlier, Thanks] -> Travel Time: About 300km away, about 3.5-4 hours driving depending on the traffic; 11:00 arrived and let's go hiking and enjoy the beautiful spring and rape blossom; 12:30-13:00 we will find a nice spot for picnic lunch (bring your own picnic lunch) 13:30 Let's keep hiking, 16:00-16:30 finish hiking 16:30 Head back to Shanghai and will arrival at Shanghai around 8pm depends on the traffic; 🥗 Meals: ***bring your own picnic lunch*** **TRIP PRICE** **398 RMB/ONE** **New Trail exploring - fitness required** **ONLY 268 RMB/ONE** **\* Participants:** 3-15 International hikers **\* Deposit:** 200RMB should be paid asap to secure your spots and the balance will be collected 1-2 days before the trip **\* Payment** can be transferred via WeChat or Alipay or Cash or Bank **Price Included:** ✅ All the transportation fees and driver’s allowances ✅ All the organizing fees and English trip leaders’ allowances ✅ Utility equipment and first aid ✅ Outdoor insurance ✅ Free water refill - please bring your own water bottle **Price Excluded:** ❌ Alcoholic drinks ❌ Personal shopping and other cost not mentioned above **CONTACT US** **More questions about our trips, Feel free to contact us** *HikingLovers-Customer Service* *WeChat 1 : hikinglovers* *WeChat 2 : hikinglovers-sh1* **CANCELLATION** -> For cancellation *up to 3 days* before departure time, the full deposit will be refunded -> For cancellation *within 3 days* of departure time, the deposit will be lost (possibility to transfer it to someone else if you find a person willing to replace you) -> HikingLovers has the right to adjust the trip schedule based on weather and safety conditions **DISCLAIMER** Considering that Outdoor hiking trips have some *unexpected risks and environmental changes or other uncertainties*, the organizer - HikingLovers will buy professional outdoor insurance for all the members before the trip and also will organize rescue for any emergency on site. *All the participants have to follow the organization of the trip organizers/ trip leaders/coordinators/Local guide.* Otherwise you should bear your own consequences caused by your own mistakes. *We hereby declare that the trip organizers will not have any joint liability of the unpredictable accidents caused by Environment or any accidents caused by the participants’ mistake during the hiking trips.* **ABOUT US** ***HikingLovers Outdoor Club*** was founded in May, 2013 by outdoor lovers who loves hiking and kinds of adventure activities! HikingLovers now turned to be an international hiking club. We organized hiking trips and kinds of adventurous acitivities for foreigners and English Speaking ppl living in Shanghai. We want to make the mixculture of “West meets East” . We have a group of energetic hiking and adventure lovers working as full-time/part-time trip learders from different countries. Join us to adventure in the wilderness and challenge yourself and explore China. **HikingLovers -- West Meets East; Keep Calm and Hike on! Exploring & Adventuring Life.**

✅ Small group (4-12ppl) ✅ Tibet permit handled for you ✅ Authentic experiences of Tibetan culture ✅ All iconic attractions included ✅ 1-2 people to sign up A classic 8-day tour that includes all of the iconic Tibet destinations, offering fabulous **monasteries**, breathtaking **high-altitude walks**, stunning views of the world’s **highest mountains** and one of the **warmest cultures** you will ever encounter. An ideal choice to fully experience the magnificient nature and fascinating culture of the sacred land of the Himalaya. **Destination:** Tibet, China **Accommodation:** 4 star hotel in Lhasa and Shigatse; one night in dorm room hostel or tent in Rongbuk with limited condition **Airport Free Picking up and Seeing Off -** Picking Up at 10:00，13:30，16:00，18:30 everyday from Lhasa airport to city downtown Seeing off at 06:30，08:00, 12:00 from Lhasa city downtown to the airport **(\*if your time falls off from these committed pickup times, there will be extra 400rmb/car for private airport pickup)** **Train station** picking up and seeing off are all **free of charge on your committed arrival and departure date.** **Notice** 1\. Each group will be confirmed with minimum of **4** guests and **12** guests maximum 2.The dates in the form highlighted **in bold** indicate that the groups have been confirmed with more than 4 guests signed up. 📅 Trip Dates & Pricing **Slow Season** Jan 11-18, **16-23, 19-26,** 22-29, **25- Feb. 1,** 29 - Feb. 5 Feb 1-8, **3-10,** 5-12, 6-13, **8-15,** 9-16, 12-19, **15- 22,19-26,** **22-Mar. 1,26- Mar. 5** Nov 1-8, 5-12, 8- 15, 12- 19,15-22, 19-26, 22-29, 26- Dec 3, 29-Dec 6 Dec 3-10, 6-13,10-17, 13-20,17-24,20-27, 24-31, 27-Jan3, 31-Jan7 **·** **Price:** RMB 6990 **·** **Single Supplement:** RMB 1400 **Normal Season** **Mar 1-8,** 4-11, 5-12, 8-15, 12- 19,**15-22,** **19-26,** 22-29, **25-Apr 1, 29 - Apr 5,** 30 - Apr. 6 **Apr. 1-8, 3-10, 5-12, 7-14, 9-16,11-18, 13-20, 16-23,**18- 25, **20-27, 23-30, 25- May 2, 27-May 4, 29-May 6** **May 1-8,** 3-10, 6-13, 8-15, **10-17,**11-18, 13-20, **14- 21,** 16-23,**17 -24,19-26,** 20-27, 22-29, **24-31,** May 25- Jun 1, 27 - Jun 3, 29-Jun 5 Oct 11-18, 12-19,14-21, 16-23, **19-26,** 21-28, 23-30, 25-Nov 1, 27-Nov3, 29-Nov5 **·** **Price:** RMB 7890 **·** **Single Supplement:** RMB 1560 **Peak Tour Season** June. 1-8, 3-10, **5-12, 7-14,** 9-16, 11-18, **14-19,**15-22, **16-23,** 17-24, 19-26, 21-28, **25 - July 2, 27 - July 4,** 29 - July 6 July. 1-8, 3-10, **5-12,8-15** **Aug. 21-28**, 23-30,**26-Sep 2**, 28-Sep 4, 30-Sep6 Sep 2-9, 4-11, 6-13, 9-16, **11-18,**13-20,16-23,**18-23** **·** **Price:** RMB 8390 **·** **Single Supplement:** RMB 1740 **TOP Peak Tour Season** July 10-17, 12-19, **15-22,**17-24, 20-27, 22- 29, 24-31, 26-Aug 2, 29-Aug 5, 31-Aug 7 Aug 3-10, 5-12, 7-14, 9-16, **11-18,** 14-19, 16-23, 18-25 Sep 20-27, 23-30, **25-Oct 2,** 27-Oct4, 30-Oct 7 Oct1-8, 4-11, **6-13,** 8-15 **·** **Price:** RMB 8990 **·** **Single Supplement:** RMB 1980 **Discounted Price For -** \* **200rmb/person off** discount price for **citizens from China including HK&Macao** \* Free of Charge for the children under 3 years old, half price for children between 4-11 years old and full price charged to children above 12 years old **🗺️ Itinerary Highlights** **Day 1 · Lhasa arrival, free time** 🚌 70kms \| 1h 🏨 Thangka Hotel Lhasa or similar ⛰️ 3650m **Day 2 · Lhasa City Sightseeing** ✨Visit Drepung Monastery and Sera Monastery Debating 🏨 Thangka Hotel Lhasa or similar 🥞 Breakfast; Welcome Dinner ⛰️ 3650m **Day 3 · Lhasa City Sightseeing** ✨Potala Palace; Local Folks Activities; Johkang Temple；Local Tea House Experience 🏨 Thangka Hotel Lhasa or similar 🥞 Breakfast; Tea Break ⛰️ 3650m **Day 4 · Lhasa - Yamdrotso - Gyatse - Shigatse** ✨ Yamdrotso Lake, Local rural family visiting & Farm lunch; Karola Glacier 🏨 Schery Hotel Shigatse or similar 🚌 360kms \| 8h 🥞 Breakfast; farm lunch ⛰️ 3650m - 5030m - 3600m **Day 5 ·Shigatse - Tingri - Everest Base Camp** ✨ overlooking Mt. Everest and the Gawula view point visit Rongpuk Monastery (3.3km to EBC, you could take a short hike there if you like) 🏨 Everest Base Camp Guest House (dorm bed) 🚌 340kms \| 8h 🥞 None ⛰️ 3650m - 4300m - 5200m **Day 6 ·Mt. Everest - Dingyal-Shigatse：Everest East sideViewpoint, Farewell Dinner** ✨Savor the beautiful moments of the early morning. Visit Rongbuk Monastery, the world's highest-altitude monastery. Drive to the Xilin View point to admire the breathtaking views of the eastern slope of Everest, and Mt. Lhotse. Share a traditional Tibetan dinner and enjoy the distinctive folk songs and dances of Shigatse. 🏨 Schery Hotel Shigatse or similar 🚌 360kms \| 8h 🥞 Breakfast; Dinner with Song and Dance Performance ⛰️ 5200m - 4300m - 3600m **Day 7 · Shigaste - Lhasa** **✨** Tashilhunpo Monastery; Yarlung Zangbo River 🏨Gang-Gyan Hotel Lhasa or similar 🚌 280kms; 5h 🥞 Breakfast ⛰️3650m **Day 8 · Lhasa departure** **🥞** Breakfast **Price includes:** **√ All necessary travel permits for Tibet** (mainland Chinese/HK citizen waived) √ Tourist bus/minibus transportation with experienced local driver during tour and between airport/train station and Hotel at designated period of time √ 6 nights accommondation: twin shared rooms with breakfast - 6 nights at 4-star hotel; 1 night at EBC area with limited condition and no breakfast. √ All admission fee of tourists sites listed in the itinerary √ Welcome dinner in D2, Tea break in D3 and Dinner with song and dance performance in D6. √ Experienced Local Tibetan private guide √ Travel insurance **Price does not include:** × Main transportation (flights/train) × Lunches except D4 and dinners Except D2 during the trip x Tips to driver and tour guide \*not mandatory × Single room supplement × Invoice and all personal expenses × Airport/train station pickup/see off out of your group dates dates or shuttle bus schedule **What you should bring:** **1\. Clothing** 1-2 pairs of durable shoes, mid-weight (may-sep) waterproof clothes (dress in layers); hat (to prevent from UV and strong wind); high-quality socks **2\. Personal Hygiene and Toiletry Items** Sun block SPF 50+, lip balm SPF 50+, moisturizing skincare products, anti-bacterial hand sanitizer, wipes, feminine products, shaving products; (for 1 night in Rongbuk: travel size soap and shampoo, toothbrush and tooth paste, disposable towel, ear plugs, etc) **3\. Others** Original passport, basic medicines, waterbottle, camera, energy snacks, power bank, books, etc **About high altitude sickness:** The average altitude of Tibet is about **4000 meters** above the sea level (Lhasa: 3700m; Shigatse: 3836m; EBC: 5100m;). You may suffer from High Altitude Sickness in the beginning days of your Tibet trip. But don’t worry too much, **the high altitude can be acclimatized usually in 2\~3 days**. Our suggestion is to take a physical examination and get suggestions from your doctor, and medicines like aspirin is helpful to ease the headache. (drinking coke is also helpful). While in Tibet, you should **keep warm all the time**, avoid running, drink more water and eat more vegetables and carbohydrates. We suggest you to not take showers during the first day after your arrival at Tibet. If you don’t feel well, get help from your tour guide or go to the hospital without any delay.

Embark on an enriching bike tour through the dynamic city of Shanghai, blending adventure, culture, and relaxation. This tour offers an immersive experience, showcasing the city's vibrant neighborhoods, historical sites, and hidden gems. Tour Highlights: Exclusive small tour group with up to 6 person Historical Landmarks and Modern Marvels: Begin in central Shanghai, cycling through a mix of colonial-era buildings and modern skyscrapers. Visit the Bund and admire the contrasting architectural styles. Bustling Markets and Serene Parks: Navigate lively markets and tranquil parks, experiencing both the city's vibrant street life and peaceful green spaces. Cultural Insights and Local Flavors: Explore the Former French Concession, with its tree-lined avenues and historic mansions. Learn about local customs and Shanghai’s art scene. Charming Coffee Break: Take a break at a quaint local café, savoring freshly brewed coffee and pastries. Enjoy a moment of relaxation and engage with fellow travelers. Hidden Gems and Scenic Routes: Discover lesser-known neighborhoods and scenic routes, including hidden temples and vibrant street art, revealing Shanghai’s authentic spirit. Tour Details: Price: 300RMB/Person Duration: Approximately 3 hours Difficulty Level: Easy (suitable for everybody) Inclusions: Professional guide, bike rental Flexibility: You can either choose to end the tour at the bund or back to meeting point What to Bring: Comfortable clothing, sunscreen, water bottle, camera Meeting Point: Central location in Shanghai (details provided upon booking) Contact: You can add me on wechat 13052007784 or call me directly with the same number to book your tour. Why Choose This Tour: Ideal for travelers seeking a unique, active way to explore Shanghai, this tour balances sightseeing, cultural immersion, and relaxation. Suitable for solo travelers, couples, and groups, it promises unforgettable memories and a deeper appreciation of Shanghai’s heritage and contemporary charm. Experience the magic of Shanghai on this captivating bike tour with a coffee break, discovering the city one pedal at a time.

http://photos4.meetupstatic.com/photos/event/6/2/2/2/600_423565122.jpeg Dramamoves.com is dedicated in providing personal service to individuals and entrepreneurs in the area of Contemporary Life , Design and Art. We hand pick the best product and import them from abroad . We hold events in our invitation venue which is just located behind Plaza 66. You are largely welcome to drop in our event or just come by to have a look. For reservation, Please call 021-62579568 to find out more ! or Wechat ID: DM_Hotline Talk to you soon ! http://photos4.meetupstatic.com/photos/event/7/3/a/c/600_423569612.jpeg

dear all, We will move to Bailian Zhongshan BEFORE jing’an opens. Welcome to join us Please confirm with me first before you signed up My WeChat is ellenliu12345 60rmb for 2 hours , 6 people share a court 小伙伴们， 所以我们在静安开放之前将会在百联中环打，欢迎加入我们

For international skiers seeking **pristine powder snow** and **unique cultural experiences,** **Changbaishan** offers an exceptional winter getaway that combines **world-class skiing** with **breathtaking natural wonders.** Located in the **"Golden Snow Belt"** at 41°N latitude, **Changbaishan** produces incredibly dry, fluffy **powder snow** with **minimal water content .** When you hold it, this **"Champagne powder"** slips through your fingers like fine flour , providing exceptionally **smooth and responsive skiing conditions.** With world-class facilities, stunning natural landscapes, and luxurious accommodations at the Wanda Jinhua Resort, this is the **perfect destination for families, couples, and ski enthusiasts alike.** **Highlights** **❄️Extra-Long Ski Season** Enjoy skiing from **mid-November to early April,** thanks to the unique **snow-friendly climate** in Changbaishan area **🏂“Harbor Skiing” Comfort** The resort’s **bowl-shaped terrain,** surrounded by mountains, ensures a **wind-free, warm skiing experience.** **🎿Expertly Designed Trails** Over **30 diverse ski trails** spanning **33 kilometers,** crafted by **Ecosign,** the Winter Olympics design team, cater to all skill levels. **☃️Fun Terrain Parks** Explore unique features like fun **U-shaped pools, beginner and intermediate parks, mushroom trails,** and **wooded trails** for added excitement. **Beyond Skiing: Unique Natural Wonders** 🧭Rime Drifting Adventure Embark on an **exciting rime drifting tour** along a frozen river in an inflatable boat, surrounded by the **spectacular rime-covered scenery** of **Mt. Changbaishan.** The frosty trees glisten like crystals under the sunlight, creating a **surreal, fairytale-like environment.** 🫧Heaven Lake Day Tour A **stunning volcanic crater lake** nestled among **16 peaks** at **2,155 meters above sea level .** This **breathtaking natural wonder** sits on the China-North Korea border . 🏂Winter Activities Diversity **·** Snowmobiling **·** Horse Sledging **·** Korean Culture Park Day Tour **·** Reindeer Park Day Tour **·** Bonfire and hotpot in snow **Exclusive Package Highlights** ✅Free Airport Pick up and Drop off ✅Daily Full Day Ski Pass Benefits (Includes ski equipment, helmets, chairlift, and magic carpet access for one session per night’s stay (clothing, goggles, and lockers available for rent). Flexible session options during peak periods like Chinese New Year.) ✅Wakoo Snow Park Tickets ✅Mt. Hanna Hot Springs Tickets ✅Water Park Passes **Destination:** Changbaishan, Jilin Province **Jan. - Mar. 2026 Winter Private Tour** **(Tailor-made itinerary trip, minimum one-day booking) Pick your own date and let's go!** **Trip Inquiry:** Telephone/WhatsAPP:0086 15001791355 Wechat: OKDealTravel Email: [contact@okdealtravelchina.com](mailto:contact@okdealtravelchina.com) **Option 1 - 5-Star Wanda Jin Suites Changbaishan** A luxurious choice with spacious suites with **two bedrooms and kitchen** for 4-5 guests, **ideal for big families seeking a premium experience.** Ski in & Ski out Just minutes from the ski slopes, with easy access to dining, shopping, and entertainment within the resort. **1-Bedroom Suite (Up to two adults and one child)** **Check - in Date(2025-26)&Price** Mar 1-15 **Price** (rmb/night) :1280 Jan 3 - Feb 1 , Feb 24-28 **Price** (rmb/night) :1950 Feb 16-23 (Chinese New Year Holiday) **Price** (rmb/night) :2980 **2-Bedroom Suite (Up to three adults and one child)** **Check - in Date(2025-26)&Price** Mar 1-15 **Price** (rmb/night) : 1580 Jan 3 - Feb 15, Feb 24-28 **Price** (rmb/night) : 2850 Feb 16-23 (Chinese New Year Holiday) **Price** (rmb/night) : 4530 **Option 2 - 4-Star Holiday Inn Express** A **budget-friendly** option, **perfect for couples or small groups,** offering modern comfort and convenience. Twin/King Room, Family Suite for 1-3 guests **Check - in Date(2025-26)&Price** Mar 1-15 **King/Twin Room** (rmb/night) : 890 **Family Suite** (rmb/night) : 990 Dec 12 - Feb 15 , Feb 24-28 **King/Twin Room** (rmb/night) : 1480 **Family Suite** (rmb/night) : 1630 Feb 16-23 (Chinese New Year Holiday) **King/Twin Room** (rmb/night) : 1980 **Family Suite** (rmb/night) : 2280 **What's included in price:** ✓ Free airport picking up & seeing off with shuttle bus in fixed schedule ✓ 1 Night\`s Accommodation in an opptional hotel next to the Ski Resort with daily breakfast ✓ Full -Day Ski Passes Included: Enjoy daily ski benefits with each night’s stay, including equipment (helmet, skis, chairlift, and magic carpet). Rentals for lockers, clothing, goggles, and gloves are available. Flexible session options during peak times like Chinese New Year. ✓ Access to Top Attractions: • Wakoo Snow Park: Perfect for families and children. (one-time access during the stay. Activities are subject to actual operations. Operating hours may vary depending on weather conditions.) • Hanran Hot Springs: Relax in natural hot springs after a day of fun.(Valid until December 31, 2024. Includes one-time access during the stay. Children’s entitlement applies to those under 1.3 meters in height.) • Water Park (Starting from December 1, one ticket entitlement per night is included. The ticket covers admission only and does not include locker rental, deposits, swim ring rental, or other additional expenses.) ✓ Free self-laundry service, gym, swimming pool and children play room in hotels ✓ Travel insurance ✓ First-aid kit, water, travel kit, etc **What's Not included in price:** ✕ Main transportation (flights) from and to Changbaishan ✕ Personal expenses and unexpected expenses ✕ Optional Changbai Mountain Heaven Lake&Rime Drifting Day Tour **What to Pack** **1.Clothes** — Thermal / Instant Dry underwear, down jacket/Outdoor Jacket/ Skiing&Snowboarding jacket, woollen pants/Skiing&Snowboarding pants, outdoor water-proof hiking shoes/ snowboots, thick socks, glasses, scarf, gloves, hat cover the ear, face mask ext. for keeping warm **2.Backpack, suitcase** **3.Accessories** — Heating pad, Lip balm, hand lotion, Sunglasses, dental floss, mouthwash, facial masks, Portable Battery, Fascia gun **4.Food and Medicine** — high energy dried snacks(like protein bars, chocolate and beef jerky...), first aid medicines，fascia gun **5.ID card /passport and enough cash.**

Come run around, throw some frisbees, play board game , and see old friends and make new ones in expo park this wekkend. Cost: RMB15 including water, Please buy the sports insurance for this event yourself inadvanced. After sign up, Please add the host wechat via hawk_cn Pickleball is a rapidly growing sport that is a mix of tennis, badminton, and ping pong. It's easy to learn, fast paced, and tons of fun! This is a game for people of all ages and skill/experience levels who want to play a friendly and non-competitive pickup frisbee game. We meet every Weekend afternoon in century park as long as weather is okay. We arrange warm up & practice. We'll work on some throws, passes, & catches. and utimate Frisbee Pickup Game of 7 vs 7 as well. All levels welcome even beginners! If you haven't played before or want to polish your skills, myself and a couple of the more experienced players will be there 30 minutes before to toss, explain the rules and run through a couple drills. We also prepare camping tarp and board games. Let's have fun by playing board games during Frisbee breakup. Please take metro line 2/7 to Century Park and the venue is entry from gate 6. (go straight 100m and the frisbee lawn is on your right side) General guidelines: Dress accordingly. Have plenty of water. Sunscreen on a sunny day. Stretch & warm up. Playing Ultimate is all about good sportsmanship, respect, and gracefulness on the field. Fun & having a good time is a must above anything else. Disclaimer： Each person who participates accepts responsibility for making their own determinations and for their own safety, conduct and well being; recognizes that possible attend outdoor activities and agrees to participate solely at their own risk. The organizer of this ultimate Frisbee event shall not be held liable for any inconvenience, accidents, rescues, injuries etc. Meetup Citywalk reserves the right to use any photograph/video taken at the Walking tour. If you have problem with this, please contact the event organizer or tout leader. Thank you for your understanding and cooperation! All those who sign up for the event will accept this declaration by default, so please read it carefully! 抛掉烦恼，接住快乐！以盘会友，飞你莫属！运动社交，快乐飞盘！掼蛋桌游，躲避球体验！ 费用：15元/人， 参与本活动务必领取活动保障，无活动当天有效保险者谢绝参与！ 友情提醒: 谢绝微商，保险，医美销售人员参与！ 活力重燃，世博文化公园飞盘桌游掼蛋派对！ 小伙伴们准备好流汗了嘛？！ 飞盘初体验，满满多巴胺\~ 周末欢乐飞盘为长期活动，活动时间安排在周末，为喜欢运动的青年朋友提供相遇的机会。 你的收获： 认识更多喜欢运动的朋友 体验极限飞盘这项运动带来的乐趣 锻炼身体，放松身心 小白友好，飞盘超容易上手，有领队飞盘入门教学。 活动流程： 01 初次见面，破冰互动 02 零基础教学，正反手传接盘练习 03 规则讲解，拉伸热身，分组对抗 04 集体合影，赛后交流 05 活动结束AA聚餐（可选） 遇见城市部落Meetup Citywalk为带社交属性的公益活动，让大家在愉快轻松的氛围中用脚步丈量和认知这个城市，以及通过羽毛球，保龄球，飞盘，骑行等活动认识新朋友。领队导游会对沿线的地标景观和历史建筑等做适度讲解，行程开始会有破冰互动和自我介绍，行程中安排小游戏，分组交谈互动，coffee break来加深了解, 帮内向的朋友放松融入团队，漫步活动结束视情况组织晚餐，增加大家的社交半径。活动参与者以8090后国内和海归名校毕业生，各行业精英为主。烦请带有不良企图和商业目的的参与者绕行 飞盘运动是一种老少咸宜的健身项目， 只要有一片空旷的场地就能开心的玩耍。飞盘的参与门槛很低。一身运动服、一双跑鞋、一片飞盘，就是全部的必要装备。 飞盘运动融合了橄榄球、足球、篮球等运动特色是一项无身体碰撞、男女差异小乐趣与竞技兼备的运动对新人友好、上手快、没有裁判不需要运动天赋 哪怕是不爱运动的小伙伴也很快可以参与其中并享受飞盘运动带来的畅爽与热血\~飞盘是少有的男女能够共同参加，需要相互配合，不容易出现身体冲撞和激烈对抗的竞技运动。进攻方通过传接飞盘推进，在得分区内接到盘得分，期间飞盘落地则攻防转换 在自己大汗淋漓 享受奔跑、跳跃 带来激情和自由的同时 也能感受到团队合作的魅力 抓盘、接盘、传盘 和队友齐心协力 体验“盘不落地，永不放弃！” 快来成为一名优秀的“操盘手”吧\~ 燃脂暴汗 比起室内的运动 户外的项目更能体验到 暴汗燃脂的畅快 为忙碌的身体放放风、充充电 和小伙伴们互相配合 制定战术、攻守兼备 通力合作最终取得胜利 玩过的小伙伴都说上瘾 “社恐星人”的社交利器： 团队运动游戏是最快打破尴尬的利器 飞盘游戏的团体意识强 每个人都需要在短时间内搭建信任和默契 直接打破圈层限制 认识更多有趣的朋友 “都市打工人”的解压利器：草坪上肆意奔跑、呐喊、欢呼不仅锻炼身体，还释放心中压力运动后荷尔蒙的飙升也使人降低防备在欢乐的氛围里更深层次的了解彼此、拉近距 “社恐星人”的社交利器： 团队运动游戏是最快打破尴尬的利器 飞盘游戏的团体意识强 每个人都需要在短时间内搭建信任和默契 直接打破圈层限制，认识更多有的朋 WFDF世界飞盘联合会将极限飞盘精神浓缩为“SOTG”图标，即熟知规则、避免身体接触、公平竞争、享受比赛、真诚沟通。独特的精神内核自这项运动诞生之日起，就蕴含其中。 飞盘绝对是让你大汗淋漓的有氧运动，因为比赛场地一般都是一整个足球场，全场人追着一个飞盘跑，享受多巴胺带来的快乐，当然它还可以满足身心愉悦的社交需求，他可以是一个人的快乐，也可以是一群人的快乐。通过飞盘场上队友双方一次又一次的飞盘抛接合作，促进了彼此之间的沟通交流。场上挥洒汗水，场下收获友谊，飞盘运动就是这么一项简单又有趣的社交运动。 燃脂，也是人们热爱大飞盘的一大原因：飞盘是一项特别好的有氧和无氧相结合的运动，一场飞盘下来就能消耗900多大卡。投接飞盘的手法千变万化。 历经20多年的变化与发展，已衍生出十余种正式的国际竞赛。参加飞盘运动的同学在锻炼身体的同时，可以结识伙伴，锻炼大脑，有益身心。即使没有一丝基础，你也可以在草地上玩得酣畅淋漓。因为飞盘上手快，是一种非常快乐的有氧运动！飞盘，是可以迅速激活全身肌肉的健身项目 ，男女同场竞技、门槛低、强社交、无身体碰撞......这些特点让任何人都能轻松上手。 Frisbee飞盘这是一项只有20多年发展历程的运动这是一项已有十余种正式国际竞赛的运动这是一项可以提高多种身体机能的运动: 眼手协调力 专注力 弹跳力 免责声明： 本活动为非盈利户外公益活动，可能存在其他风险因素。团队的任何一名队员都应本着：“尽力救助，风险自担”的原则参加这次活动，参与人员选择共同参与，属于自愿行为，双方不存在强制性约束力。并且明确知道此次活动不存在合同范畴的权利义务关系。 主办方负责对活动进行组织协调，如活动中发生意外事故，组织者有义务组织救援，但不承担任何法律和经济责任，特此申明！ 如活动中产生经济与身体损害，由受损害人和本组织声明依法解决，特此声明。凡报名参与此次活动，均视为已阅读并认可本声明，活动开始后本声明自动生效并表明你接受本声明，否则，请在活动开始前退出！参加活动请自行购买至少涵盖活动当日的意外险，未购买活动当日意外险的谢绝参与活动！ 照片说明：默认主办方拥有活动当天所有相关照片的使用权、传播权。如有异议，请提前与领队沟通，否则默认同意上述条款。 报名后请添加领队获取最新活动安排。

请添加我的微信：**GD-Karen** 我将把您加入微信群。您也可以扫描上方图片中的二维码直接添加我。所有最终安排及活动详情都会通过微信公布。活动将以中英文进行，您也可借此机会练习商务英语。 诚邀您参加在人民广场举行的轻松交流活动。 您可以展示自己的产品或服务，拓展人脉关系，或者只是来放松一下。 参与费用为人民币50元，包含充足的啤酒与软饮，以及高质量的交流机会。 无需压力，无需正装。只需带上您的智慧、创意与积极的能量。 让我们共同 **建立联系、携手合作、创造价值**！ 👉 参与方式：请添加Karen微信 **GD-Karen** 所有最终安排及活动详情均将在微信中发布。

**Please add my WeChat** **GD-Karen. All final arrangements and event details are shared on WeChat. I will add you to a WeChat group. Remember to mention 3D Printing when you add me as I have a few WeChat groups.** Hello everyone, my name is Karen. I’ve launched a 3D-printing startup near People’s Square, and I’d like to connect with others who are interested in 3D printing—whether for technical discussions, resource sharing, or project collaboration. From time to time, I may have larger projects where partnership could benefit everyone involved. If so, I’d be glad to share both the work and the revenue. Hope to meet fellow enthusiasts soon.

f you are looking to get most of your night I highly suggest you to join a Bar hopping tour where you will enjoy the night live and make new friends. Tour Details: Price: 199 RMB Duration: 3 hours Inclusions: English speaking guide, 2 free shots, 4-5 bars Meeting Point: Chicken&egg No291 fumin road Meeting time: 8PM Contact: Please add Wechat 13052007784 or call this number directly to book your tour. Bar crawls can be a fun and exciting way to explore a new city or nightlife scene, but they can also be challenging if you're not prepared. Here are some tips to help you survive a bar crawl: Read The Communication Beforehand: we will send out information to you via email before the Crawl to know where and when to go to check in and register. Arrive On Time: If you arrive late to registration you might miss out on some of the fun. Pace Yourself: It's essential to pace yourself and drink responsibly during a bar crawl. Stay Hydrated: Drinking plenty of water can help you stay hydrated and reduce the risk of a hangover the next day and help with your overconsumption of alcohol during the Crawl. Eat Beforehand: Eating a substantial meal before the bar crawl can help absorb alcohol and prevent you from getting too drunk too quickly. Dress Comfortably: Wear comfortable shoes and clothing that allows you to move freely and stay cool. Stay Safe: Stick together with your group, and make sure to have a designated driver or plan for transportation at the end of the night. Conclusion In summary, a bar crawl is an event where a group of people visit multiple bars or pubs in a single night. And it can be a great time as you travel from bar to bar. Now that you know what the bar crawl experience is all about, you can make your crawling experience even more fun by join us

### **Please contact me using WhatsApp only** ***My WhatsApp is +86 13917794769*** Hi everyone! I’m Karen, and I run a small 3D printing studio right in the heart of People’s Square, Shanghai. Whether you're an entrepreneur, designer, engineer, hobbyist, or someone with a cool idea you’ve always wanted to turn into reality — let’s connect! I’m exploring **overseas collaboration opportunities**, especially with: * 🌐 **Foreigners living in Shanghai** * ✈️ **Foreigners abroad who want to test or produce small-batch items in China** ### **What we can discuss** • Feasibility of 3D-printing **industrial components**, prototypes, or personal-use products • Choosing suitable materials for strength, flexibility, or precision • Small-batch production for startups • How to **3D print in Shanghai and ship overseas**, or • Have your printed items carried back home by community members traveling abroad ### **Why join?** Shanghai is a global manufacturing hub — and 3D printing makes prototyping fast, flexible, and cost-effective. This meetup is a chance to share your ideas, ask questions, and see what's possible. No prior experience required — just curiosity! 📍 **Location:** People’s Square, Shanghai ⏰ **Time:** Flexible 💬 **Join us and chat about bringing your product ideas to life!**

## **Building Your Own LLM from Scratch** 🚀 Led by Maria Razzhivina (AI/ML Engineer & Codebar organizer) 💡 A fun, hands-on session to build a language model step by step and demystify how LLMs work — perfect for advancing your AI skills! All levels welcome (beginners to experienced) Bring: Laptop + Google Colab 💻 When: Saturday, March 21st, 14:00–17:00 ⏰ Where: 信条书店 (Tenet Reviver Bookstore) 📍 ## **Requirements:** * A computer **Speaker:** [Maria Razzhivina](https://www.linkedin.com/in/maria-razzhivina/) **Where:** 信条书店 **Tenet Reviver** ONE EAST Plaza L2-1A&B 788 Zhongshan S 1st Road, Huangpu District, Shanghai World Expo Museum Line 13 Exit 3A 信条书店 上海市黄浦区中山南一路788号博荟广场 **About codebar Shanghai** **[codebar](https://codebar.io/)** is a charity that facilitates the growth of a diverse tech community by running free regular programming workshops for minority groups in tech. **Sponsors:** 信条书店 Tenet Reviver

The multimedia spectacular show, "Era – Spirit of Shanghai," has been hailed for its blend of Chinese acrobatics, extreme sports and dance along with Western theater and cutting-edge technologies, as well as a distinctive storyline and spectacular scenes that are full of Chinese elements. the hit residency is an of Shanghai's vibrancy. Entitled "Spirit of Shanghai," the show follows a young couple's tour around the city, exploring its past, present and future. A cooperation between the French troupe Le Cirque Phenix, Shanghai Acrobatic Troupe, Era 2 returns to the Chinese city with more fashionable elements and a jaw-dropping experience. Original Price for B area tickets is **480 RMB/person**, group purchase only **239RMB/person**. Original Price for A area tickets is **580 RMB/person**, group purchase only **289RMB/person**. More than 50% discount! How to book 1 book from meetup and paymen buy wechat & alipay 2 scan the Kuaituantuan QR and book through the wechat program 3 contact tel & wechat 18516304409

Builders, creators, architects, admins, consultants - come one, come all. This one's for you. We're bringing a little friendly competition to the Columbus ServiceNow community while highlighting the cool things people have built on the platform. Five presenters will take the stage to showcase something they've built, solved, designed, or imagined on the ServiceNow platform - and a panel of judges (plus YOU, our amazing audience) will score them live. So basically, America's Got Talent but make it ServiceNow's Got Talent. Bring a notepad if you'd like 'cause you'll definitely be learning something new. Each presenter gets 10 minutes max to wow the crowd with: • A demo • A real-world business solution • A bold idea • A UX transformation • Or a creative use of the platform Judging Criteria: 🏆 Business Value 🚀 Innovation ✨ User Experience This event is about celebrating ideas, sharing knowledge, and showing how ServiceNow can drive both business impact and meaningful user value. Come learn. Come support. Come get inspired. Refreshments and bites will be provided. And maybe next time… you’ll be on stage.

Bienvenue! Columbus French Conversation group invites you to our Saturday morning French conversation club. Expect a casual and welcoming atmosphere in which to learn french! I will bring my laptop so we can look up new vocabulary as needed! The venue is a beautiful French restaurant so you can really get into the zone :)

Discover Kiro, AWS’s innovative development environment that adapts to your workflow. Whether you prefer specification-driven development or a more intuitive, vibe-based approach, Kiro empowers you to build applications your way. In this session, speakers will explore Kiro’s core functionality and its evolution through re:Invent 2025, along with demonstrations of prompts used to create APIs, hooks, and steering documents. In the latter part of the session, watch as we build a complete example from scratch, showcasing Kiro’s agentic AI workflow in action for spec-driven development and vibe coding. What You'll Learn - Core Kiro concepts and development philosophy Feature evolution: pre and post re:Invent 2025 Practical examples: API creation, hooks, and steering docs Live coding demonstration with real-time problem solving Who Should Attend - Developers, solutions architects, and technical leaders interested in modern AWS development tools and AI-assisted coding workflows. **Speakers Bio:** Matthew Jorat: Matthew Jorat is a Customer Solutions Manager at AWS with nearly three decades of expertise in AI, cloud transformation, migration, modernization, IT, technology, and business. His career spans infrastructure engineer, solutions architect, security auditor, customer success director, support and services director, and operations officer. He was an early adopter of AWS services as a customer, and his current role at AWS uniquely blends his technical and business skills as he partners with executive teams to translate strategic priorities into measurable business outcomes through cloud adoption, AI implementation, and operational excellence. Matt leads end-to-end AI initiatives for enterprise customers, identifying high-impact use cases and maintaining relentless focus on measurable ROI. He holds eight AWS certifications and serves as Adjunct Professor at Franklin University teaching cloud computing and AWS architecture. His expertise encompasses GenAI, agentic AI systems, migration, modernization, and optimization strategies that drive transformation at scale. [https://www.linkedin.com/in/mattjorat/](https://www.linkedin.com/in/mattjorat/) Girish Bhatia: Girish Bhatia is a seasoned technology delivery leader with deep expertise in cross-domain program management. He holds multiple AWS certifications, including AWS Certified Solutions Architect – Associate, AWS Certified Developer – Associate, and AWS Generative AI Practitioner, and is also an AWS Community Builder. Girish brings over two decades of experience in the information technology industry. Throughout his career, Girish has led major technology-driven business transformation from modernizing on-premises applications to driving large-scale cloud migrations. His work includes API-based integration platforms, data-center and mainframe modernization, and enterprise cloud adoption initiatives. Based in Columbus, Ohio, Girish works at a tech-forward fintech company. He is passionate about AWS serverless architectures, Generative AI and emerging cloud technologies. An avid learner and builder, he continues to explore and apply the latest innovations in AWS to help organizations accelerate their digital transformation. https://www.linkedin.com/in/girishbhatia/[https://www.linkedin.com/in/girishbhatia/](https://www.linkedin.com/in/girishbhatia/) **THANK YOU** *Franklin University* for hosting our meetup! To learn more about *Franklin University*, please visit their website: https://www.franklin.edu/ **DIRECTIONS** Franklin University Fisher Hall 300 E. Main St, Columbus, OH 43215 Map: https://maps.app.goo.gl/jxjBA2hUmS5qrvhq8 Parking is FREE! Please park in Lot C in front of Fisher Hall. See attached map. NOTE: Map the address only. When mapping with Google Maps it may use the Fisher Hall at OSU, which is NOT correct. **Want to sponsor the pizza and/or bar tab?** Please contact me if you would like to sponsor this meetup's pizza and/or bar tab: angelo@mandato.com

Do you want more motivation and confidence to build Lasting Relationships? This is a free, in-person meeting on the subject of betrayals, losses and how to get over them so you can build lasting relationships. Are you burdened by a stressful relationship? Unhealthy relationships can trigger feelings of anger, despair or self-doubt. They can create dwindling spirals of fights and seeking to make-up, or trying to “pin the blame” on someone or something. If you don’t find the RIGHT reasons, or select the correct sources of the problem, the problem can just get worse and worse. Whether in love or personal ties, with friends or at work, our life really IS affected by the quality of our relationships. Good ones can promote pleasure and survival, while less optimum ones can lead to annoyance, anger, self-doubt, stress, or even affect our health and ability to survive well. Whether you are suffering from a divorce, or a painful break-up, don’t know who to trust (or who to CHOOSE) as a partner, friend, boss or employee - the anxiety of relationship troubles can really make a mess of things. Maybe you’ve suffered a betrayal, or are dealing with hostility or criticalness or invalidation. Dwindling relationships can involve destructive behavior, where we hurt those we love, or start succumbing to self-destructive thoughts, attitudes or behaviors that spiral out of control and affect much more than our immediate relationship. Past losses in love or life can affect how we act or react to new people and situations and hold us back from even starting to create new, possibly great relationships! How can one get back onto a saner course of action? Come to our Meetup, where we can introduce you to some of the knowledge, tools and techniques of the breakthroughs in the field of the mind that we can apply to this ever important area of life: human relationships! Break free from self imposed limitations Here we will discuss: • How to “erase” the trauma of past hurts and betrayals so that one isn’t always repeating past mistakes. • Why and how do the negative emotions of others affect you? • Why is my partner withdrawing and what can I do about it? • Why do we sometimes feel compelled to hurt the ones we love? • Fights & arguments - what's really behind them? • What underlies “corrosive criticism” or the need to invalidate self or others? • How one can stably change one’s outlook on life so they can affect positive change? • Where do compulsive destructive behaviors come from and what can be done about them? • How to form closer bonds & keep growing the relationships with the people you care about? • How to enhance one’s own ability to survive and create positive healthy relationships whether in love, family & friendships or in work, business or one’s career? Relationships can be hard and life itself IS challenging. Why not arm yourself with the knowledge and breakthroughs that have been made about the mind, mental reactions & interpersonal relationships, so that one has better awareness and control over themselves and life in general. Learn where painful experiences are “stored” and how they can unknowingly affect us. You will also find out how one can “erase” those past painful experiences so that one is free to move forward without being tripped up by the past. Learn too, about what can lead some people to become “toxic” personalities and how to identify those traits in others so you won’t be tripped up trusting the wrong person. Our free Meet-ups occur in a safe environment where one can learn, without fear of judgment or criticism, and without the recommendation of harmful mental techniques or therapies, just how YOU can get yourself onto a happier & more successful path: in love & in life. Be sure to click on the red "Attend" button below to come to this local event. We look forward to seeing you there. This class is held at the Dianetics and Scientology Life Improvement Center.

Join us for this free, in person meeting on the subject of betrayals, losses and how to get over them so you can build lasting relationships. Do you want more motivation and confidence to build lasting relationships? Are you burdened by a stressful relationship? Unhealthy relationships can trigger feelings of anger, despair or self-doubt. They can create dwindling spirals of fights and seeking to make-up, or trying to “pin the blame” on someone or something. If you don’t find the RIGHT reasons, or select the correct sources of the problem, the problem can just get worse and worse. Whether in love or personal ties, with friends or at work, our life really IS affected by the quality of our relationships. Good ones can promote pleasure and survival, while less optimum ones can lead to annoyance, anger, self-doubt, stress, or even affect our health and ability to survive well. Whether you are suffering from a divorce, or a painful break-up, don’t know who to trust (or who to CHOOSE) as a partner, friend, boss or employee - the anxiety of relationship troubles can really make a mess of things. Maybe you’ve suffered a betrayal, or are dealing with hostility or criticalness or invalidation. Dwindling relationships can involve destructive behavior, where we hurt those we love, or start succumbing to self-destructive thoughts, attitudes or behaviors that spiral out of control and affect much more than our immediate relationship. Past losses in love or life can affect how we act or react to new people and situations and hold us back from even starting to create new, possibly great relationships! How can one get back onto a saner course of action? Come to our Meetup, where we can introduce you to some of the knowledge, tools and techniques of the breakthroughs in the field of the mind that we can apply to this ever important area of life: human relationships! Break free from self imposed limitations Here we will discuss: • How to “erase” the trauma of past hurts and betrayals so that one isn’t always repeating past mistakes. • Why and how do the negative emotions of others affect you? • Why is my partner withdrawing and what can I do about it? • Why do we sometimes feel compelled to hurt the ones we love? • Fights & arguments - what's really behind them? • What underlies “corrosive criticism” or the need to invalidate self or others? • How one can stably change one’s outlook on life so they can affect positive change? • Where do compulsive destructive behaviors come from and what can be done about them? • How to form closer bonds & keep growing the relationships with the people you care about? • How to enhance one’s own ability to survive and create positive healthy relationships whether in love, family & friendships or in work, business or one’s career? Relationships can be hard and life itself IS challenging. Why not arm yourself with the knowledge and breakthroughs that have been made about the mind, mental reactions & interpersonal relationships, so that one has better awareness and control over themselves and life in general. Learn where painful experiences are “stored” and how they can unknowingly affect us. You will also find out how one can “erase” those past painful experiences so that one is free to move forward without being tripped up by the past. Learn too, about what can lead some people to become “toxic” personalities and how to identify those traits in others so you won’t be tripped up trusting the wrong person. Our free Meet-ups occur in a safe environment where one can learn, without fear of judgment or criticism, and without the recommendation of harmful mental techniques or therapies, just how YOU can get yourself onto a happier & more successful path: in love & in life. We look forward to having you join us! This class is held at the Dianetics and Scientology Life Improvement Center of Central Ohio.

**Improving Office in Franklinton** Physical location: Improving Office 330 Rush Alley Suite #150 Columbus, OH 43215 Schedule: 6:00 p.m.: Socialize, eat, and drink. Improving will be providing pizza and beverages. 6:30 to 8:00 pm. Main meeting and presentation(s). Topic: Type Annotations with John Cassidy We meet on the last Monday of each Month. Presentations are given by members and friends of this group. If you would like to do a presentation (small or large) on a python topic, please contact Central OH Python at centralohpython@gmail.com