According to local discussion on http://zh.wikinews.org/wiki/Wikinews:%E8%8C%B6%E9%A6%86#.E5.9B.9E.E9.80.80.E5.93.A1.E6.AC.8A.E9.99.90
We are requesting for create a new user group which is called "Rollbacker" (回退員 in Chinese) and this usergroup will hold the permissions "rollback".
Any sysop are allowed to grant or remove this permission.
Version: unspecified
Severity: enhancement