> For the complete documentation index, see [llms.txt](https://en.chanyuan8.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://en.chanyuan8.org/china-xanadu-home/a-happy-life-is-hard-earned..md).

# A happy life is hard-earned.

Xue Feng

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