Don’t study it.Play with it.

Interactive ideas, experiments, and explainers designed to make learning easier to start.

Milk Tea × EBITDA

Can buying a ¥5,000 machine leave EBITDA unchanged?

You run a small milk tea shop with ¥8,000 in the till. A new sealing machine costs ¥5,000. Try it before anyone explains it.

Shop ledgerBeforeAfter

Why?

Full game not yet available

I make small interactive experiences that turn difficult ideas into something you can explore, question, and enjoy.

01
Finance
Money, value, and the numbers behind a business — learned by moving them.
- InteractiveMilk Tea × EBITDA Run a small shop and watch the P&L react.Full game not yet available
02
AI
How models behave, where they break, and how to work with them well.
First pieces in progress.
03
Software
Systems, tools, and the ideas that keep code understandable.
First pieces in progress.
04
Product
Turning a fuzzy problem into something people can actually use.
- ProjectGoodIdea An AI team that helps shape ideas — you make the calls.
- ProjectForge Engineering context before a coding agent starts.

I’m Jianguo Ding, a software engineer. I’m interested in software, AI, and product thinking — and in making complex ideas easier to understand.