Method 1: find a magnet to contact the lock head of the magnetic buckle (at the bulge of the magnetic buckle), gently shake the magnetic buckle to make the steel ball fully contact with the magnet, and pull out the steel needle. Be careful not to forcibly pull out the steel needle when the magnet touches the lock head, because if the steel ball is not attracted by the magnet, it will only be pulled tighter and tighter. Try to pull out the steel needle after a full turn.

Method 2: The previous steps are the same as above. When the magnet comes into contact with the lock head, the hand holding the magnetic buckle gently taps the magnet with a little force, then turns the magnetic buckle, and then pulls out the steel needle with a nail.

Method 3: Just burn the position of the lock core, that is, use a tool to open a small gap to take out the spring, then knock the steel needle up a few times on the table and gently pull out the steel needle.

Method 4: Find a supermarket assistant and don't forget the receipt.