At present, there are many tutorials for unlocking, flashing recovery, flashing, etc. on the Internet, but they are all in 2015 or older versions, and some people follow the operation but have no effect.
I have nothing to do today, I sorted out the process I operated and the problems I encountered
A. Unlocking process
1) To get a new machine, you need to go to the official website http://www.miui.com/unlock/ to apply for unlocking, and then wait for a while, there will be a text message to notify you that the application is successful.
2) At this time, you can go to http://www.miui.com/unlock/ again to download the unlocking tool, then log in to your Xiaomi account on the phone, and log in to your same Xiaomi account with the unlocking tool, then turn off the phone, press Press and hold the power button and the volume "-" button, enter Xiaomi's Fastboot mode for 3-5 seconds, then connect the unlocking tool with a data cable, and click to execute the unlocking operation. success
B. Get root?
After unlocking, now the official website http://rom.xiaomi.cn/list-169-1-21-21-1-1 has the development version of the wire brush package, or update and push the development version, directly upgrade, brush development, Or after the upgrade and development, there is an "authorization management" in the lower right corner of the "Security Center", click to enter, there is an open ROOT permission, confirm to open, the phone will automatically update, start ROOT..., it has its own ROOT, so, no What ROOT software is needed, you can do it.