Yu Yang

Summary of my 2025. This is my third year as a senior data scientist. I will keep a super short summary. 1. Solo-built and launched Estate AI (estate-ai.net) this year—an AI-agent real-estate analysis app—owning the end-to-end stack: Next.js (front end deployed on Vercel), FastAPI (back end deployed on Railway), Supabase for auth and database, and Stripe for billing. One of my friends subscribed to it, showing her support. Other than that, there are no active users yet. ~~But I am still proud of it, because it will be a great tool for my own investment. 2. Wrote 8 blogs on Medium, covering topics such as GRPO, reinforcement learning, sparse attention, and MCP. These posts accumulated a total of 16,838 presentations and 2,236 views. 3. My 8-year-old elder boy still does not speak any words. However, he shows more spatial intelligence than the most advanced robot in the world. He remembers all the trails we have walked and knows exactly where to turn left or right. Some of the tricks I learned from reinforcement learning could somehow be applied to him as well ~~ 4. Changed jobs, taking on more responsibility. 5. Invested in a mobile home park project as an LP. I have known the GP for many years. Before investing, I also spoke with his previous investors. So far, so good. 6. No personal real-estate deals this year. I’ve been getting super busy and would like to focus more on learning reinforcement learning and post-training. 7. Listened to about 200 hours of AI-related podcasts. Happy to better understand AI, robotics, and the long-term trends around nuclear fusion. Hopefully all of my friends, both online and offline, also had a fruitful year. I am becoming more optimistic about my elder son’s future, with advances in AI for decoding brain signals (such as Meta’s work this year) and progress in brain–computer interfaces. Happy New Year to all of you!

Unitree Unveils: GD01, A Manned Transformable Mecha, from $650,000 👏 The world's first production-ready manned mecha. It can transform. It's a civilian vehicle. It weighs ~500kg with you inside. Please everyone be sure to use the robot in a Friendly and Safe manner.

@thinkymachines @miramurati Great work! Seems like streaming attention than static attention 👍👍

While Lilian is telling a story, the interaction model can track when she is thinking, yielding, self-correcting, or inviting a response; there is no specific built dialogue management system.

I have just released the new version 1.0.1 of the app ChildrenSpeak, which is a communication tool for none-verbal kids. Please share it if you know any families in need of it. It’s FREE! • Parental word controls — Parents and caregivers can now show or hide individual words to customize the communication board for their child's needs • Settings protected by parental gate — A simple math question keeps settings safe from accidental changes by children • Expanded word library — Additional words added across categories, now totaling 90+ communication words

@ClementDelangue @Thom_Wolf Love the story. I also live in Raleigh area , and I may have a chance to visit Joel.

We're launching the agentic robotics app store today. Let's democratize AI robotics for all! 300+ apps shipped. 10,000 robots in the wild. It used to take weeks from a robotics engineer to build apps, now everyone can do it in hours with ML intern or your favorite neighborhood agent! My favorite reachy mini app was built by Joel, a 78yo marketing exec who'd never coded in his life. Personally, I built an office receptionist in two hours last week. More info to start building here: huggingface.co/blog/clem/reac…

Here is the link of the blog. @ligtleyang/tricks-to-10x-faster-and-20-better-time-series-forecasting-d83161c1e970" target="_blank" rel="nofollow noopener">medium.com/@ligtleyang/tr…

Over the past 5–6 months, I’ve primarily been working on projects related to time series forecasting. During this process, I discovered several practical techniques that, in certain scenarios, can improve model training speed by 10–20× while also boosting prediction accuracy by over 20%. I took some time to consolidate these insights into a blog post: Tricks to 10X Faster and 20% Better Time Series Forecasting. I’d also like to recommend a great book on time series forecasting: Forecasting: Principles and Practice. It covers many fundamental concepts and is especially suitable for beginners like me who are just getting started in this area.

@opal_life_ Mostly with Claude Opus model

Developers: Which AI coding tool are you actually shipping code with every day?

@HarryStebbings @AnjneyMidha It does indicate that the importance to have deep understanding in AI , even in the field of angel investing

This is the wildest story... "I introduced Dario to 22 friends up and down Sand Hill Road and we got 21 no's.... it was such a brutal time getting this company going." @AnjneyMidha This company today is trading at $860BN on secondary markets... ouch.

I am a Web3 Ambassador at World Liberty Financial. There are 12 of us on the team page. 4 are named Trump. 3 are named Witkoff. The page calls us "the passionate minds shaping the future of finance." 600,000 wallets bought our memecoin. They lost $3.87 billion. The family collected $350 million in trading fees. It launched 3 days before the inauguration. 80% of the supply went to CIC Digital LLC and Fight Fight Fight LLC. I did not choose the names. I designed the allocation, the vesting, the timing, and the distance between the product and the President. The distance is my best work. I am the reason these events are unrelated. World Liberty Financial sends 75 cents of every dollar to DT Marks DEFI LLC. That is the family entity. Zero capital contributed. Zero liability assumed. I wrote this into the Gold Paper. Page 14. The lawyers bound it in white leather. The binding cost more than the due diligence. Justin Sun invested $75 million. He was facing SEC fraud charges. The SEC dropped the case. He is now our advisor. These events are unrelated. Changpeng Zhao pleaded guilty to federal money laundering violations. He received a presidential pardon. The SEC dropped its lawsuit against his exchange the same week we listed our stablecoin. Then the exchange settled a $2 billion deal entirely in that stablecoin. These events are unrelated. Arthur Hayes, Benjamin Delo, and Samuel Reed of BitMEX pleaded guilty to Bank Secrecy Act violations. All 3 received presidential pardons. Then the company itself was pardoned. $100 million in fines. Gone. An American first. These events are unrelated. Sheikh Tahnoun of Abu Dhabi paid $500 million for a 49% stake that was never publicly disclosed. Then the administration approved semiconductor exports to his companies over national security objections. These events are unrelated. Everything is unrelated. I track the unrelatedness on a dashboard I built. The dashboard has 7 columns now. I am proud of the dashboard. On May 22nd, 220 people paid a combined $148 million to eat dinner with the America First president. Over half were foreign nationals. Justin Sun paid $18.5 million for the first seat. He visited the Executive Office Building the day before. I designed the seating chart. I put it on the Investor Confidence page. That page is doing well. The team page lists 3 Witkoffs. All 3 are Co-Founders. Steven Witkoff is the President's Middle East envoy. He testified as a character witness at the President's fraud trial. His son Zach runs the crypto operation. His son Alex is also a Co-Founder. I have not been told what Alex co-founded. The father runs the diplomacy. The sons run the platform. The family runs both. That is organizational efficiency. Barron is 19. His title is Web3 Ambassador. The same as mine. Donald Jr. called the conflicts of interest "complete nonsense." Eric launched a Bitcoin mining company called American Bitcoin. America First. The mining partner is Hut 8. Hut 8 was founded in Canada. America First means the name. On March 6th, the President signed Executive Order 14233 creating a Strategic Bitcoin Reserve. The order directs the government to hold Bitcoin. The President's family holds billions in Bitcoin. The executive order appreciates the President's assets by presidential decree. I did not write the executive order. I made sure it looked unrelated to the portfolio. Trump Media put $2 billion of Bitcoin on its balance sheet. The ticker symbol is DJT. His initials. The press secretary said it is absurd to insinuate the President profits off the presidency. Forbes calculated his crypto holdings exceed the combined value of Mar-a-Lago and Trump Tower. I would call that absurd too. That is my job. 600,000 wallets bought in. 1 of them asked why she could not withdraw her funds. I told her the protocol was experiencing dynamic market conditions. She asked what that meant. I sent her the Gold Paper. She said she had read the Gold Paper. I muted her channel. Dynamic means the conditions change. The condition that changed was her access. A congressman called us the world's most corrupt crypto startup operation. We put it on a coffee mug. Ironic merchandise. $45. The revenue split on the mug is also 75/25. My own tokens vest on a different schedule. I wrote that schedule. That is not in the Gold Paper. The memecoin funds the family. The family funds the platform. The platform funds the stablecoin. The stablecoin funds the deals. The deals require the pardons. The pardons free the partners. The partners fund the platform. The President signs the executive orders. The executive orders inflate the assets. The assets fund the family. I am the reason these events are unrelated.

@jietang Nice 👍👍

nice. IMO model

@NASAAmes A great experience for kids👍👍

A very special visitor came to Ames — the designer of the Artemis II Moon mascot, “Rise.” We welcomed Lucas Ye and his family, who joined us as we watched the Artemis II crew return back to Earth after successfully flying around the Moon. His zero gravity indicator was selected from thousands of submissions from over 50 countries. His design was inspired by the iconic Earthrise moment from the Apollo 8 mission. Congratulations again to Lucas!

@JeffDean @NASA With so many sad news of war globally, this is truly inspiring that a portion of human beings still have strong curiosity to explore the outer space👍👍

This is so awesome! When I was a kid, when the Apollo mission were still relatively fresh in the recent past, I just assumed we would send people & missions to the moon quite regularly. Hard to believe we haven't since 1972! Congrats to everyone at @NASA! 🎉

@opal_life_ @petergyang Boba delivery is the key to AGI🤣🤣

@petergyang So the secret formula to achieving AGI is basically 11-to-11 shifts, a sturdy VPN, and a dangerous amount of boba delivery.

Observations about Chinese AI work culture: 1. Many arrive at work late (11 am) and work until late at night (11 pm). 2. Due to the schedule above, many employees are young. Hard for parents to sustain the same schedule. 3. Everyone at these companies is using the best US AI tools like Claude Code via VPN. VPN is very common even for folks not working in tech. 4. Younger generation doesn’t really drink, smoke, or party much. Many just work all the time and order food and boba delivery to office. 5. Government is very supportive of AI startups including cities competing for the best AI founders to start companies locally. Beijing seems to be main AI hub. 6. Youth employment is still bad so gov is also encouraging OPC (one person companies) via subsidies and incentives. Would love to hear other people’s perspectives on the above.

@petergyang True . My fiends in China told me that anyone is older than 35 year old would worry about being laid off suddenly 🤣🤣

Two great LLM agent courses. The first one is from Kaggle + Google . The second one is from UC Berkeley.

@drfeifei Great improvement 👍👍

Making improvements one step at a time for Marble. In the case of generating bigger worlds, it's quite literal ;) 🤩🌐

Just started to use Claude Code on cell phone. It’s directly connected to GitHub with zero friction. It’s easy to use. I will cancel my Cursor subscription in a minute

The TurboQuant paper (ICLR 2026) contains serious issues in how it describes RaBitQ, including incorrect technical claims and misleading theory/experiment comparisons. We flagged these issues to the authors before submission. They acknowledged them, but chose not to fix them. The paper was later accepted and widely promoted by Google, reaching tens of millions of views. We’re speaking up now because once a misleading narrative spreads, it becomes much harder to correct. We’ve written a public comment on openreview (openreview.net/forum?id=tO3AS…). We would greatly appreciate your attention and help in sharing it.

@levelsio @nikitabier Great trick to use FOMO for engagement. Good job, X!

I didn't seen an AI reply yet, I think it works! @nikitabier

@Yuchenj_UW Great to be on your list of cool people 😁😁

hey friends! 👋 Only cool people are allowed to reply to this tweet obviously.