One. Will a locksmith damage the lock when opening it?
Attempting to pick a lock may result in damage to the lock. Lock picking involves opening a lock, and each type of lock has unique construction, which determines its function. Without a key, attempting to pick a lock will inevitably damage the lock mechanism. However, some locksmiths can open locks without using excessive force, thus preventing damage to the lock.
Can the locks still be used after a locksmith has opened them?

Can be used as is.
A reputable locksmith company should be registered with the local police department, providing a reliable service. Hiring someone from a street vendor is less reliable. If you are still concerned, it is best to replace the lock. While it may cost a bit, it provides peace of mind and avoids potential complications that could distract you from your work.
Three. How can a locksmith company determine if it is a legitimate company?
1、 Professional qualifications
Locksmith companies need to register with the local police station and obtain permits for each lock opening service. Therefore, when seeking assistance, it is crucial to choose a team with legitimate credentials. There are several reliable methods: one is to contact the local police station to arrange for designated personnel to come and perform the service, with the client covering the costs; or two, to request the community's property management company to dispatch their regular service provider, with the price based on the standards provided by the property management.
2、 Identity verification
Each lock-opening service involves a thorough verification process. Professional technicians typically require clients to provide proof of identity or accompany them, and even opening a company safe may necessitate a business license. As the person requesting assistance, it is essential to provide proof of employment, such as a work permit or company registration documents. This is a matter of mutual responsibility and demonstrates a commitment to the service.
3、 Photograph for record-keeping.
Many locksmiths take photos of the client's identification, such as property certificates and driver's licenses, as per the service standards set by the local police. This is primarily to prevent unauthorized access and theft. Clients can use this opportunity to verify the locksmith's credentials and ensure proper procedures. They can also proactively take photos and record the locksmith's identification and supporting documents for future reference, particularly in case of issues with the locks.
4、 Room Description
If the locksmith is a licensed professional, after opening the door, they will typically ask the homeowner to describe the contents of the room and verify them one by one before leaving. If the description does not match the actual arrangement of the room, the locksmith will immediately take action, such as contacting the police: "I am a professional locksmith, but the police are the authorized personnel for verification."