How to install:
1. Disable Driver Signature on your PC/Laptop. You can read in this thread:http://en.miui.com/thread-237673-1-1.html
2. If you already installed MiFlash on your computer, you must uninstall it first.
3. Download MiFlash Tool and extract it.
4. Double Klik on MiFlash20161222
5. The instructions is in Chinnese Language, so you can look at the pictures below to install it to your PC/Laptop.