Install new Launcher – Nova or ZenUI (*best)

Deleting system files requires root. Rooting Android with KingRoot. Infected files will find using Titanium Backup or Root Explorer.

and delete files:
/system/launcher/
/system/app/DQBAGAN/*
/system/app/DQDocumentsToGo/*
/system/app/DQGO/*
/system/app/DQXENDER/*
/system/etc/apps/360Ben_XYX.apk
/system/etc/apps/AntutuHard_XYX.apk
/system/etc/apps/Antutu_XYX.apk
/system/etc/apps/AntutuYanji_XYX.apk
/system/etc/apps/CPUZ_XYX.apk
/system/etc/apps/Ludashi_XYX.apk
/system/priv-app/caller_id_x.x.x/*
/system/priv-app/launcher-mate7_x.x.x/
/system/priv-app/lqsdk_x.x.x/*
/system/priv-app/themebox_x.x.x/

KingRoot 4.85 other apps on Google Play.