> For the complete documentation index, see [llms.txt](https://help.firstline.cc/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.firstline.cc/feature/channels/jin-jie-gong-neng.md).

# 進階功能

- [收回單一訊息](https://help.firstline.cc/feature/channels/jin-jie-gong-neng/shou-hui-dan-yi-xun-xi.md)
- [封鎖聯絡人](https://help.firstline.cc/feature/channels/jin-jie-gong-neng/feng-suo-lian-luo-ren.md)