It is with a heavy heart that I must announce that, regarding the Mechen H1, the 4" media player that runs Android 6.0 and supports installing applications through adb, there does not appear to be a way to root the device. While it is surprisingly flexible and does everything I would expect an mp3 player to do, this means that I cannot use it for usbgadget shenanigans and will have to, potentially, find a different device for that.
