How to open a permanent lock without a key?

1. Use a hammer: insert the hammer into the bottom of the lock core gently, and then knock it down hard, which may loosen the lock core and open the lock.

2. Use pliers: clamp the lock core with pliers, and then turn the pliers gently, which may loosen the lock core and open the lock.

3. Use a screwdriver: Insert a screwdriver into the bottom of the lock core, and then push it down hard, which may loosen the lock core and open the lock.

4. Use an impact drill: drill a small hole in the bottom of the lock core with an impact drill, which may loosen the lock core and open the lock.