Xiaomi Mi 6
Download and Install Xposed Framework For MIUI 9 Android 7.0 Android 7.1, Working with ARM and ARM 64-bit Chipset Phones
Here is the guide to install the TWRP 3.1.1 recovery and method to root Xiaomi Mi 6. Follow this guide and enjoy flashing.
Guide To Change Font In MIUI 8 Device Without Root, This method will work Xiaomi Mi Redmi with MIUI 8 Non-rooted rooted devices