How to unlock the door?
1. Iron wire unlocking: ordinary iron wire is twisted into a "J" shape and inserted from the keyhole into the key tooth.
2. Turn the key in the direction of the key and try a few more times.
3. Card unlocking: If it is an ordinary lock, there is no back lock, and the door gap is slightly wider. Use a first-generation ID card or hard card, insert it from the crack of the door to the lock point and push it inward. After a few more attempts, the door can be opened.