163 mirrors

sudo sed -e 's|^mirrorlist=|#mirrorlist=|g' \
         -e 's|^#baseurl=http://mirror.centos.org/$contentdir/$releasever|baseurl=https://mirrors.163.com/centos/8|g' \
         -i.bak \
         /etc/yum.repos.d/CentOS-Base.repo \
         /etc/yum.repos.d/CentOS-Extras.repo \
         /etc/yum.repos.d/CentOS-AppStream.repo

UUID of Network Interface

nmcli connection show

NAME                UUID                                  TYPE            DEVICE 
virbr0              4e02750f-13d9-4662-bfc2-10f9ae1a71bd  bridge          virbr0 
Wired connection 1  09066de3-7eb7-4ee1-9059-c651b6dff7a6  802-3-ethernet  --     
enp0s3              5144084b-0537-4e4b-9f15-065431bc6d38  802-3-ethernet  --