1、jingle@jingle:~/Downloads$ cat /etc/apt/sources.list
## Generated by deepin-installer-reborn
deb [by-hash=force] http://packages.deepin.com/deepin panda main contrib non-free
#deb-src http://packages.deepin.com/deepin panda main contrib non-free

看看此文件有没有修改

2、cd /etc/apt/sources.list.d 目录下有没有外部源

3、 sudo apt-get update && sudo apt-get install apps.com.wechat.web 试试提示什么（例如安装网页版微信）