Update firmware operation process: 1. First, insert the TYPE-C interface USB cable, and connect the other end to the computer; 2. Long press the BOOT button ; 3. Press the RST button; 4. Release the BOOT button after 1 second; 5. The computer will automatically recognize it as a removable hard disk; 6. Copy the file to be downloaded (burned) to the removable hard disk that appears, and the core board will restart automatically