-Flash in twrp-I tried it in old firmware a23 and it works, people in a34, a46 can try, because oppo a5s kernel source code for us is in 2019, backup boot.img before flash, if want to go back to stock kernel restore stock boot.img in twrp-Annoying warning notify for root not showing when using kernelsu, you dont need use lsposed to hiden it.