> For the complete documentation index, see [llms.txt](https://puzzle-and-key-universe.gitbook.io/archive/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://puzzle-and-key-universe.gitbook.io/archive/p-and-ku0-zero/jian-jie.md).

# 简介