Backport #24925, partially backport #24934
(`docs/content/doc/help/faq.zh-cn.md` file)
Part of backport has already done by #24942
Also backport #24881 to avoid "deadlock"
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Co-authored-by: Zettat123 <zettat123@gmail.com>
Backport #24979
Changes:
1. Use uniform links types relative to doc folder (start with `doc/`)
2. According to [docusaurus
links](https://docusaurus.io/docs/markdown-features/links), if `<a>` is
used, the `href` is resolved as URL location, but not file location. So
need to use `[text]({{< relref "path" >}})` instead.
