有8.5
https://mirrors.tuna.tsinghua.edu.cn/centos/8.5.2111/

有8-stream
https://mirrors.tuna.tsinghua.edu.cn/centos/8-stream/

还有9-stream
https://mirrors.tuna.tsinghua.edu.cn/centos-stream/9-stream/

更奇怪的是我还看到一个9（不带stream后缀）
https://admin.fedoraproject.org/mirrormanager/
在这个页面查看，可以看到
https://admin.fedoraproject.org/mirrormanager/mirrors/CentOS/9-stream
https://admin.fedoraproject.org/mirrormanager/mirrors/CentOS/9
两个链接
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FROM 222.71.112.*