What if the key won't turn in the lock?

The lock cylinder cannot turn in the key lock for the following reasons:

1. The lock cylinder is rusted. Lead powder or sewing machine oil can be coated on the lock core to achieve lubrication effect. Try turning or pulling out the key.

2. It may be caused by the dislocation of the lock core. You can press the keyhole with your hand and try it with your other hand.

3. Insert a flat, slender metal tool similar to a U-shaped pin into one side of the lock cylinder to help try to open it.

If it still doesn't work, you can only find a locksmith to solve it.