新版android7.0以后，刷机root新方案，刷机前切记先退出 查找手机 功能
解除BL锁
http://en.miui.com/unlock/download_en.html
http://www.miui.com/unlock/index.html
刷入twrp
下载1
https://twrp.me/xiaomi/xiaomiredmi4a.html
下载2
https://androidfilehost.com/?w=files&flid=50678
下载3
https://pan.baidu.com/s/1tUgDiW_MF521lmCC2oXMhQ
教程
http://www.romleyuan.com/lec/read?id=111
固件下载（欧版）查找HM4A
https://sourceforge.net/projects/xiaomi-eu-multilang-miui-roms/files/xiaomi.eu/MIUI-STABLE-RELEASES/MIUIv10/
欧版论坛
https://xiaomi.eu/community/forums/xiaomi-redmi-4-4a-pro-4x.150/
其它版本
https://xiaomifirmwareupdater.com/firmware/
刷机后小米应用商店
http://apps.xiaomi.com/details?id=com.ye.guo.sp
红米8a大神论坛
https://forum.xda-developers.com/xiaomi-redmi-8a
magisk
https://forum.xda-developers.com/xiaomi-redmi-8a/how-to/guide-how-to-install-magisk-miui-how-to-t4030175
另附HM8A
https://www.gizdev.com/root-redmi-8a