> 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/2017/03/24.md).

# 24

凡走过，必有痕迹

![](https://385430918-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-M8iFCzaIpXf8zXqpE6I%2F-MTY0ARGOA5uU_Zjz55P%2F-MTY0gdjX90VZf1G2zwH%2Fimage.png?alt=media\&token=5d0a2cb1-a1fe-447c-a1e6-d25abcb75c79)