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A startup handbook for ordinary people.

Printable CN+EN Git cheatsheet for undo/rebase panic, with a free Panic Card sample

An AI agent-powered scientific research assistance platform developed with the philosophy of 'letting knowledge emerge naturally'.

A digital Buddhist canon that starts from the scriptures to understand the Dharma — nearly 20,000 volumes of sutras with plain-language explanations and keyword hints, without altering the original text.

One brutal puzzle a day. Sharpen your brain in minutes.

A family learning companion that turns daily effort into growth