Replace the lock core: 1, remove the handles on both sides of the door, 2 loosen the screws fixing the lock core on the lock body, 3 remove the lock core and put in a new lock core. Replacing the lock cylinder is very simple and does not require technology and experience. When the landlord buys a lock cylinder, he should talk about disassembling the lock cylinder, see if there is a steel seal on the lock cylinder and take a photo, so that he can provide it to the store when buying the lock cylinder and ask him to recommend a suitable lock cylinder for you.

True or false: it seems that the lock core of the gold dot atom has anti-counterfeiting code. Scratch the code to the Golden Point official website to verify the authenticity.