First ，you should download all zips you need
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Anriod 9.0 rom
link：https://drive.google.com/uc?id=1 ... Jdk&export=download
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3rdparty recovery（include twrp）
link：https://pan.baidu.com/s/1aA4xW8uTU3IZjsb2yEl3EA Extration code：heg4
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fireware
link：https://github.com/XiaomiFirmwar ... g/stable-25.01.2019
Second,flash the rom you download
- use usb to connect your mobile phone with PC ，select MTP
- press the volume down and power button until entering fastboot
- unzip the 3rdparty recovery you have download，then click the red one
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if succeed ,reboot to recovery,just like this
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if your miui's data partition is locked ,click wipe to clean ，format data/
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transfer Anriod 9.0 rom's zip and fireware's zip to your phone from PC
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click install ，enter sdcard，there should be your zips
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flash fireware's zip first ,slide to flash,succeed.
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then flash Anriod 9.0 rom ,if succeed,reboot to see what you have done!
Third ,addition modules
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flash google apps
link：https://opengapps.org/?arch=arm64&api=9.0&variant=nano（but stock and super variants are not recommended!!! ）
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flash magisk to access root previleges
link：https://github.com/topjohnwu/Mag ... .1/Magisk-v18.1.zip
（if not matched go to github to select ：https://github.com/topjohnwu/Magisk/releases）
this process is the same as the flash on rom above, I'll not say again
Fourth，if you want to install xposed framework
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please go to this tutorial
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maybe this will also be helpful if known Chinese
link：https://www.xzymoe.com/android-9-flash-xposed/
(better to use suitable version)
what I use
- Magisk-v18.1.zip
- magisk-riru-core-v15.zip
- magisk-EdXposed-v0.2.9.8_beta1-release.zip
- EdXposedInstaller_v2.2.0-release.apk
It works
