Operation method
Turn the password ring to the position of the small round hole, find the position of the small round hole, and turn right 3 or 5 times.
If it still cannot be opened, adjust the password to the initial state and start debugging to 999 according to the box password ring.
If the box is locked in the open state, there are three small screws inside which the whole lock head can be disassembled. If you don't want to replace it, you can replace it with a new one.
Push the wheel towards the spring with force, and rotate the wheel at the same time. If it feels loose, it means the number is correct.