There is no screenshot during installation, find a picture of centos7, and replace the URL with your own version version 8 below
mirrors.aliyun.com/centos/8/BaseOS/x86_64/os/
Version 8.2.2004
mirrors.aliyun.com/centos/8.2.2004/BaseOS/x86_64/os/
Version 8.3.2011 (currently the latest)
mirrors.aliyun.com/centos/8.3.2011/BaseOS/x86_64/os/