> For the complete documentation index, see [llms.txt](https://www.oulan.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://www.oulan.com/2017/05/19.md). # 19 早安，世界。早安，城市里打拼的人们。早安，乡野里香风扑面的人们。