Server = https://mirrors.tuna.tsinghua.edu.cn/archlinux/$repo/os/$arch
[archlinuxcn]
Server = https://mirrors.tuna.tsinghua.edu.cn/archlinuxcn/$arch
# 前置:已把上面的 [archlinuxcn] 段写进 /etc/pacman.conf(https://mirrors.tuna.tsinghua.edu.cn/archlinuxcn)
sudo pacman -Syy
sudo pacman -S archlinuxcn-keyring