One. How to open a door using a lock with a handle.
At this stage, a specialized tool, specifically a sharp and narrow blade, is required. The sharper the blade, the better. First, position the door from the outside, ensuring that the central, expandable portion of the locking mechanism (also known as the locking pin) does not contact the locking groove. This minimizes friction. Then, insert the blade into the gap between the locking groove and the locking pin, applying pressure to the locking pin in the direction of its free movement. You may need to repeat this process several times. When operating the tool, prioritize safety and avoid injury.
Two. Techniques for opening locks using a key

1、 Release the locking mechanism.
"Generally, doors become stuck due to external forces, such as a broken or misaligned lock tongue, or loose screws that secure the lock tongue. In these cases, the best course of action is to locate the lock tongue and manually re-insert the detached screws from the inside. This method is only applicable when the door is stuck due to external forces."
2、Method for opening a door lock due to foreign objects
For situations where a foreign object is lodged in a door lock, preventing it from opening, the following emergency measures should be taken. When a foreign object is lodged in a door lock, making it impossible to open with a key or by hand, even after attempting to insert something, the lock needs to be forced open. First, determine whether the door opens inward or outward. If it opens inward, apply inward force. If it opens outward, apply outward force.
3、Please hire a professional locksmith.
If the above methods are unsuccessful, consider hiring a professional locksmith to open the lock. This can help protect the door from damage. It is best to hire a locksmith with a good reputation, as the safety of your home is at stake.