> For the complete documentation index, see [llms.txt](https://wiki.kabala.vn/hdsd/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://wiki.kabala.vn/hdsd/thu-ngo.md).

# Thư ngỏ

<figure><img src="/files/uzhK3RnF3aJPqn6jc5A4" alt=""><figcaption></figcaption></figure>