> 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/2017/04/21.md).

# 21

你可能需要一个契机。早安，世界。早安，奇迹即将发生的你。

<figure><img src="/files/p8cfRFoF5JQ7a6ycfROa" alt=""><figcaption></figcaption></figure>