Langolink Lock (China), as the Chinese mainland version of the fully automatic smart lock built on Langolink Internet of Things technology, offers an extremely rich range of unlocking methods. It covers face recognition, fingerprint recognition, password input, NFC card sensing, and remote unlocking, greatly meeting the diverse and convenient door-opening needs of users. Moreover, this smart lock is equipped with a real-time video call function, providing a solid guarantee for users' home security and convenient communication.