No sign-up, no paywall — just AI-built tools from my own side-hustle and investing experiments. Use them, break them, and let me know what's missing.
Built for my own value-investing practice. No sign-up, no data saved — just frameworks I actually use.
Score a stock against Warren Buffett's investing principles — financial health, moat, management, valuation — and get a clear verdict.
Open Tool →A full toolbox for screening and scoring Chinese A-share stocks using value-investing criteria, built for my own daily analysis.
Open Tool →Buffett's "20 punches in a lifetime" thought experiment, turned into an interactive card so you can actually track your own punches.
Open Tool →Input a company, check 12 value-investing criteria — scalability, pricing power, growth runway, financial discipline — and see if it has the profile that creates decade-long wealth.
Run the Screen →Eight honest questions about one holding. Find out whether you're holding it on a live thesis — or just emotionally attached. Conviction vs. attachment, two minutes, no data saved.
Take the Check →Six honest questions that separate the investment case from the ego case. Are you holding on logic — or just avoiding admitting you were wrong?
Run the Check →Financial reports tell you what a company did. The shelf tells you what it's doing now. A 10-point grassroots research checklist for consumer stocks.
Start the Test →Things I built when I needed a tool that didn't exist — career planning, exam prep, challenge quizzes.
12 questions across four dimensions — AI at work, continuous learning, financial resilience, and health. Find out how prepared your career is for the next five years.
Take the Assessment →3.4 million applicants. 39,000 jobs. Try the actual 公务员考试 questions that shut out 99% of test-takers. Could you even clear the cut-off?
Take the Challenge →20 real questions from the exam sat by 12.6 million Chinese students in 2026. Click to answer, instant score. How do you compare?
Take the Test →I pitted 3 Chinese AI models (Kimi, Doubao, Qianwen) against 3 American ones (ChatGPT, Gemini, Claude) to predict 14 World Cup matches. They agreed on 12/14. Where they split — and what I bought with real money.
Read the Experiment →At each turning point in a real person's life, you face the same choice they did — before you see what they actually did. No right answers until you commit. Read the story behind these →
Bankrupt at 21. Lost his first character to a contract. Bet the studio on Snow White when everyone called it "Disney's Folly." 7 decisions that built the most recognizable brand on earth.
Play the Simulation →Chased a Model T barefoot as a child. His factory was bombed twice. He started over in a shed with ¥3,500. 7 decisions from that shed to Le Mans.
Play the Simulation →Studied in secret under Russian occupation. Moved to Paris alone with almost nothing. Became the only person ever to win Nobel Prizes in two different sciences. 7 decisions.
Play the Simulation →Dropped out, got fired from his own company, bought Pixar for $5M when everyone laughed, then came back and built the iPhone. 7 decisions across 35 years of impossible bets.
Play the Simulation →Single mother on welfare. Rejected by 12 publishers. Writing in cafés during her baby's naps. Built the best-selling book series in history. 7 decisions before a single reader knew her name.
Play the Simulation →Fired from her first TV job for being "too emotional." That quality became her entire business model. 7 decisions from a Mississippi farm to the most powerful person in American media.
Play the Simulation →Quit his Stanford PhD after 2 days. Put his last dollars into a rocket that kept exploding. Slept on factory floors. Built the most valuable car company on earth — simultaneously with SpaceX.
Play the Simulation →Imprisoned 27 years. Offered freedom if he renounced his principles — he refused. When finally released, he chose reconciliation over revenge and freed a nation. 7 decisions.
Play the Simulation →Rejected by Harvard. Moved to Omaha to think clearly. Refused to buy dot-com stocks when everyone said he'd lost his touch. Became the greatest investor in history by refusing to think like everyone else.
Play the Simulation →At 21, doctors said he had 2 years to live. He lived 55 more — unable to walk or speak — and became the most famous scientist in the world. 7 decisions about black holes, love, and floating free.
Play the Simulation →People you've probably never heard of — who did something nobody thought was possible. These are the stories that don't make the history books but probably should.
You've never heard this name. He started as a broke motorcycle repairman with no money and no team. Then he beat Ducati at the World Superbike Championship on a Chinese-made bike. 7 decisions.
Play the Simulation →The biggest tool suite on this site. 757 Chinese university majors + 259 career paths + 13 ranking lists — all cross-linked and updated with live vote data.
757 Chinese university majors translated into English. Vote for the ones you think will matter most in 4 years. Live leaderboard with AI impact ratings. Running until 2028.
Vote Now →🇨🇳 中文版本 (Chinese Version) — 757个专业、二维码分享、报考问卷
Every career reachable from a Chinese undergraduate degree. Monthly salary range, AI disruption level, required skills, and which major leads there — for all 259 careers.
Browse Careers →Best majors overall, AI-resistant picks, AI editor's choice, plus 10 category rankings (engineering, medicine, science, economics, law, and more). Updated with live vote data.
See Rankings →Built with AI, used by me first. More tools coming as I keep experimenting — read the story behind them.