The source project of this merge request has been removed.
add CN repos
add China mirrors:
Tsinghua University Mirror: mirrors.tuna.tsinghua.edu.cn
Nanjing University Mirror: mirrors.nju.edu.cn
Edited by Jiaxu Zi
add China mirrors:
Tsinghua University Mirror: mirrors.tuna.tsinghua.edu.cn
Nanjing University Mirror: mirrors.nju.edu.cn