跨版本升级操作如下：
1、将15.11官方源替换成20官方源（/etc/apt/sources.list）
deb [by-hash=force] https://community-packages.deepin.com/deepin/ apricot main contrib non-free

2、新增20官方商店源（/etc/apt/sources.list.d/appstore.list ），无list文件创建后添加：
deb https://community-store-packages.deepin.com/appstore eagle appstore

Upgrade to deepin 20 from deepin 15.11
Change the source in /etc/apt/sources.list to
deb [by-hash=force] https://community-packages.deepin.com/deepin/ apricot main contrib non-free
2、Add the official source for app store in /etc/apt/sources.list.d/appstore.list. If no such a list file, please create one there and add below source:
deb https://community-store-packages.deepin.com/appstore eagle appstore

OK, thanks, I will try.

You can try change source to upgrade Deepin 20, but possible have system problem.(I can't have problem when upgrade Deepin 20)
Propose you download new Deepin image and install for this Deepin image

Edited by lawman at 2020-9-20 20:02

我从Deepin15.11 升了去Deepin v20. Reboot 后，电脑问我password 和 user name. Deepinv20没有表示输入错误，但是不能login. 按蓝色键，等了一会电脑又回到这login screen.

C:\Users\A16846\Desktop\IMG_20200920_190509.jpg

什么可以login到？

Anybody helps me ?