In the beginning, the fingerprint code lock could replace the lock cylinder. According to China's hardware lock product standards, fingerprint code locks are emergency mechanical locks. Mandatory requirements of the Ministry of Public Security: all door locks must be equipped with mechanical locks to prevent power failure or failure of locks. Doors can be opened with mechanical equipment keys. So all anti-theft locks have lock cylinder, so fingerprint code lock can also change the lock cylinder.

Second, what is a lock cylinder? It is the key part to open the operation lock, the cardiovascular system of the hardware lock, and the key part to turn and push the lock to keep fit.