You can insert the key into the lock hole and push the protrusion back to the right to force the combination lock to be opened. Or use a screwdriver, pliers and other tools to slowly open the lock head, and then reinstall it, and the combination lock can be easily opened. It should be noted that both of these methods are destructive, which may make the password lock unusable. In addition, you can aim the wheels of the password box at the place with strong light, look in from the gap of each wheel, and slowly turn the wheel, and you can see that there are two depressions on the wheel. The big depression plus 5 is the password of this wheel. For example, if the depressions of three wheels are above 2, 4 and 0 respectively, then their passwords are 7, 9 and 5(2+5=7, 4+5=9, 0+5=5). Or take the password box to a bright place, or shine it with a flashlight on your mobile phone, dial the number with an ear-plucking tool, and then watch the password place of the password box carefully with your eyes wide open. There will be a gap in one number in each group, just stay in that position and find the gap in the other two groups of numbers. You can also find a place with good light (or use a flashlight) and look at the iron plate under the password thumbwheel. If you look carefully, you will find a small gap. At this time, you can point all three gaps to the left, and then subtract three (five) from each number to the left, which is the password. But different brands of luggage keys are different. So you need to know the brand of your lockbox at this time.