Writing
Words & Ideas
Essays, working notes, and published analysis on technology, education, parenting, and China.
On this site
Notes
Living pages about raising children, education, technology, and the choices families make. I revise them when my thinking changes.
Six Questions I Teach My Children to Ask
The six questions we use in our family to slow down, understand what is happening, and make a more thoughtful choice.
How I Help My Kids Explain Their Thinking
The questions I use to help my children understand why they believe something—and become comfortable checking, correcting, and changing their minds.
Technology in Our Family Life
What I am really trying to teach through screen-time limits: planning, stopping, and control over your own actions.
Personal Newsletter
My Substack
Technology, education, parenting — my personal voice on what matters.
January 21, 2026
Inside China's Real Advantage: Manufacturing at Scale
Notes from Liyang, China's battery capital, and the infrastructure reshaping global supply chains…
Read →
December 17, 2025
What Chinese Scientists Think the World Could Look Like By 2049
Where advanced technology is treated as something to shape, not something to avoid…
Read →
November 25, 2025
AI’s Bottleneck Is Power. The US and China Feel It Differently.
The US needs more generation. But China needs more efficiency.…
Read →
October 15, 2025
What Surprised Me Most on Our Deep Tech China Trip
Notes from inside an ecosystem defined by constraint, coordination, and speed…
Read →
February 27, 2023
The Dangers of a Too-Hot ChatGPT Craze
甲小姐对话张斯成:ChatGPT过热容易导致错误判断 | 甲子光年…
Read →
February 23, 2023
Coming soon
Hey there, fellow curious minds!…
Read →
Company Newsletter
Tech Buzz China
Tech Buzz China is the company I founded to cover China's technology industry. This is a team publication — I contribute and help guide its editorial direction, but it's not exclusively my work.
October 9, 2026
China’s Battery Advantage Meets the AI Boom
From China’s western computing hubs to America’s grid-constrained data centers, batteries are becoming an increasingly important part of AI infrastructure.…
Read →
October 1, 2026
China Wants to Get Inside Your Head
Inside China’s race to build a brain-implant industry, where competing technologies are advancing alongside the clinical and commercial systems needed to bring them into medical ca…
Read →
September 23, 2026
China Is Confronting AI Risks Without Slowing Development
Cybersecurity disclosures add urgency to U.S.–China safety talks, but AI’s strategic value will keep Beijing pushing ahead.…
Read →
September 16, 2026
Why Tencent, ByteDance and Alibaba Want to Own China’s AI Office
China’s tech giants want to turn the AI tools employees use into a bigger share of their employers’ software, cloud and services budgets.…
Read →
Real-time Thoughts
On Twitter / X
Daily China tech analysis, education hot takes, and whatever I'm thinking about.
Follow @ruima
Daily takes on China tech, AI in education, and what's worth paying attention to.
Follow on X →