1.Unpack files.
2.Copy SD_CarDV.bin to a micro SD card.
3.Put the micro SD card in Xiaomi 70 mai dash cam.
4.Connect the device to external power supply and switch it on.
5.The device will start blinking with a blue light.
6.After a  successful firmware update the device will say something and turn the blue LED off.

Warning! 
I take absolutely no responsibility for any damage caused by the firmware update or whatever you do with your device after you download these files!
Commercial use of this firmware update package is strictly prohibited!