Xiaomi teases MIUI 7 China Developer ROM 6.1.21 with big permission updates

[Lockscreen, Status Bar, Notification Bar]

• New version of daily lockscreen. You can now easily
  view, share and apply wallpaper on lockscreen

[Permissions]

• You can now restrict all apps from using a certain
  feature.

MIUI 7 China Developer ROM 6.1.21 will be released Friday with a full change log.