Cannot update software source on 20.9

Other technical issues
1

Status code: 404 for https://dl-cdn.openeuler.openatom.cn/openEuler-20.09/OS/x86_64/repodata/repomd.xml

建议ISO镜像标注一下，哪些版本可以更新软件包，不然白下载和安装了

2

Resolved through this post: 【汇总贴】openEuler常用repo源 - #2，来自 lipingEmmaSiguyi