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JianguoDing
English

Think, explore, share.

Notes on technology, products, hands-on work and the world around me. Some become articles; others become things you can explore for yourself.

Start with an article

02 / ARTICLES & THOUGHTS

Articles & thoughts

Writing on technology, products, research and personal observations. Choose an article to preview before reading.

Choose an article

03 / INTERACTIVE LEARNING

Interactive learning

Explore technical and financial concepts through hands-on examples, small games and visualizations.

An illustration of notes becoming searchable documents

RAG basics: how AI looks up information

Explore document retrieval, finding evidence and generating an answer through a playable example.

Start exploring ↗
A diagram showing text divided into meaningful chunks

RAG chunking: where should text be split?

Compare chunking strategies and see how text boundaries affect retrieval.

Try the experiment ↗
Handwritten notes connecting revenue, profit and cash

A finance game: why profit is not cash

Use interactive cases to distinguish revenue, profit and cash flow.

Play the game ↗
A small wooden cash box with coins and a ledger on a desk, a seedling growing from the box

Bookkeeping: From Cash to Credit

Start with a cash box and explore assets, liabilities, and everyday bookkeeping.

Start bookkeeping ↗

04 / PROJECTS & ENGINEERING

Projects & engineering

Systems and engineering experiments built to address real problems, with discoveries from the work.

A painting of Water Margin characters and scenes

Water Margin · GraphRAG

Beta · Chinese interface

A knowledge-exploration experiment using a literary text to connect characters, events and original evidence.

An experimental system; retrieval and evidence chains are still being evaluated.

Explore the Beta ↗
Concept diagram of ingestion, retrieval, answer generation and evaluation in a RAG workflow

RAG in practice

Experiments in retrieval, chunking, ranking, and evidence selection — including what worked, what failed, and what changed along the way.

Starts from a real case where a question over Cloudflare Docs got an incomplete answer. Failed attempts are kept on record; the cover is conceptual and does not depict the actual configuration.

Read the investigation ↗

ABOUT / ARCHIVE

Hello, I’m Jianguo.

I work on software, AI and products, and record the observations and judgments that emerge. These notes can be revisited, discussed and revised as experience grows.