我也是，u盘装了两遍系统打开商店都显示网络错误

sudo apt update  试试

~$ sudo apt update
[sudo] mandouba 的密码：
获取:1 https://cdn-package-store6.deepin.com/appstore eagle InRelease [5,277 B]
命中:2 https://community-packages.deepin.com/deepin apricot InRelease      
获取:3 https://cdn-package-store6.deepin.com/appstore eagle/appstore amd64 Packages [345 kB]
错误:3 https://cdn-package-store6.deepin.com/appstore eagle/appstore amd64 Packages
  文件尺寸不符(344275 != 344776)。您使用的镜像正在同步中？ [IP: 120.192.92.219 443]
  Hashes of expected file:
   - Filesize:344776 [weak]
   - SHA256:541913cf5863896a77764e3017d78c202fd4cc576057d643e725b71e1b0ffa79
   - SHA1:5bdc097447f2845479be66825cfad5260b0942b9 [weak]
   - MD5Sum:b1d5f417e147232c4f0fcefcb5da35e6 [weak]
  Release file created at: Thu, 16 Apr 2020 17:36:21 +0000
获取:4 https://cdn-package-store6.deepin.com/appstore eagle/appstore i386 Packages [66.1 kB]
命中:5 http://uos.deepin.cn/printer eagle InRelease                       
已下载 5,277 B，耗时 1秒 (3,571 B/s)
正在读取软件包列表... 完成
E: 无法下载 https://cdn-package-store6.deepi ... y-amd64/Packages.gz  文件尺寸不符(344275 != 344776)。您使用的镜像正在同步中？ [IP: 120.192.92.219 443]
   Hashes of expected file:
    - Filesize:344776 [weak]
    - SHA256:541913cf5863896a77764e3017d78c202fd4cc576057d643e725b71e1b0ffa79
    - SHA1:5bdc097447f2845479be66825cfad5260b0942b9 [weak]
    - MD5Sum:b1d5f417e147232c4f0fcefcb5da35e6 [weak]
   Release file created at: Thu, 16 Apr 2020 17:36:21 +0000
E: 部分索引文件下载失败。如果忽略它们，那将转而使用旧的索引文件。

发尼玛的啥 啊