Hello MIUIers of Italy and welcome to the complete changelog for the new version of the China Developer branch that reaches the MIUI 7.7.20 numbering and I remember it being published weekly every Thursday night.
As usual in these weeks pre-MIUI9, there is little "fuss" in changelogs. Developers are obviously busy with the latest preparations for the debut of MIUI9 and the remaining time to devote to MIUI8 is poco. Nonetheless, we are pleased to see updated to 1 ° July 2017 the Android security patch confirming that Xiaomi pays special attention to safety.
MIUI 8 China Developer ROM 7.7.20 Full Changelog
System
Improved - Security patch updated
New - Added SplitScreen Function (Only Xiaomi Mi6)
Status bar, Trend notifications, Status bar
Enhanced - Black and white characters alternate faster in the notification curve
Camera
Fixed - The camera sometimes did not work with an error at the opening
Feedback
New - Added Customer Service Feedback (China Only)
New - CTA statement when the app is used for the first time (07-17)
Battery usage
New - Option to automatically activate the power-saving energy that is fully charged
Safety
New - New application management feature
Source | MIUI Forum