Dear @kuailexs,
11). The Flyme 8.0.5.0A (Android 7), released 2020-07-08/14 - can it be helpful for porting our MeizuPro5 phones to 20.04?
11.0). https://www.flyme.cn/firmwarelist-23.html
11.1). https://www.youtube.com/watch?v=HQKlzdEoCkY
11.2). https://reameizu.com/flyme-update-china-8050a-stable/
11.3). https://firmware.meizu.com/Firmware/Flyme/PRO_5/8.0.5.0/cn/20200708025823/d7a76ff5/update.zip
11.4). http://forum.flymeos.com/thread-53138-1-1.html
11.5). https://www.youtube.com/embed/IrJuXcUDwnU
11.6). https://addrom.com/rom-global-meizu-pro-5-m86/
11.7). https://azrom.net/rom-global-meizu-pro-5-m86-unbrick-firmware-ota-update/
11.8). https://4pda.to/forum/index.php?showtopic=701576&st=17820
11.9). http://reproductormp3.net/index.php?topic=25688.240
11.10). https://zh.wikipedia.org/zh-tw/Flyme#cite_note-16
12). It seems to me that even a higher version of Flyme for MeizuPro5 is available (daily) - 8.19.11.21A - see "11.7)." but I have a problem with the download link...
Thanks in advance and kind regards ~~ Piotrek~~pe3no