1.https://web.vip.miui.com/page/info/mio/mio/detail?postId=21522862&app_version=dev.20051
尋找合適的包
2.http://www.miui.com/unlock/index.html
綁定帳號，解鎖手機，首次綁定需要等待7天
3.https://web.vip.miui.com/page/info/mio/mio/detail?isTop=0&postId=17936575&fromBoardId=&app_version=dev.10085&ori_version=dev.10085&ori_miui_version=9.12.27&ori_android_version=10&ori_front_version=null&ori_version=dev.10085&ori_miui_version=9.12.27&ori_android_version=10&ori_front_version=null&ori_version=dev.10085&ori_miui_version=20.1.4&ori_android_version=10&ori_front_version=112
線刷教程，下載線刷包后直接解壓到桌面，mi flash安裝驅動，加載設備，之后選擇解壓包的路徑，刷機即可