Fastboot Guide
1. Go to fastboot mode
2. then type fastboot flash super(drag and drop super img provided)
3. then fastboot --disable-verity --disable-verification flash vbmeta(vbmeta of stock china rom)
4. then fastboot reboot recovery
5. wipe data
6. came to fastboot mode again
7. type fastboot oem cdmsl
8. type fastboot set_ active a (this will set boot partition to a )