Before attempting any update, it's crucial to know exactly what you're working with. The "ZXDZ 01" is not a single product but a reference design based on the "掌讯 (Zhangxun)" solution, manufactured by various third-party companies for the aftermarket car audio market.
Troubleshooting
Sometimes a successful update scrambles touchscreen coordinates. If this happens, you will need to enter the device's "Factory Settings" (often using a passcode like 8888 , 1234 , or 0000 ) and look for "Touch Screen Parameter Calibration." zxdz 01 android update link