Add new China mirror

data/mirrors/China

@@ -5,3 +5,4 @@
 [China]
 Server = http://mirrors.ustc.edu.cn/manjaro/$branch/$repo/$arch
 Server = http://mirror.bjtu.edu.cn/manjaro/$branch/$repo/$arch
+Server = http://ftp.cuhk.edu.hk/pub/Linux/manjaro/$branch/$repo/$arch