What should I do if the newly bought building door lock is broken and I can't open it? What if the property is not urgent?

Usually, the two sides of the anti-theft door lock are connected with each other. Try poking it from the inside with the original key. I broke it several times, and it poked out in it. If it really doesn't work, buy a new lock and ask for the original one. Don't say you broke it, it's easy to be slaughtered. Say that your child is playful, and that his quality is so good that other keys can get stuck as soon as they are inserted. That boastful boss is stingy when he is happy. Businesses have this mentality, believe me.