I cannot log in to the system with any password
It may be that some operation has damaged the system.
1 Please try to enter the desktop as follows:
(1) Press ctrl + alt + F2 to enter the terminal. If it does not work, change F2 to F1~F7, as long as you can enter the terminal
(2) Enter startx in the terminal and press Enter.
2 If it does not work, enter the following command in the terminal to reinstall Raspberry Pi UI (graphical interface):
sudo apt-get install --reinstall raspberrypi-ui-mods
3 If it still does not work, re-burn the system (our official website provides image files, please find it in the product purchase page on our website)