around 70%; in the Chinese market, the penetration rate among target users exceeds 10%. The penetration rate of the smart door lock market in Europe and the United States is about 50%. The function of smart door locks in European and American countries is relatively simple, generally a single password, single Bluetooth or single fingerprint, and mainly embedded smart door locks. In the civilian market, mechanical Locks are mainly used, and smart door locks are mostly used in commercial fields. 2. Application scenarios Home smart lock: Standard features: fingerprint lock, password, credit card, emergency mechanical key. Some lock companies will add APP application management and smart cat eye functions. Home locks are mainly aimed at consumers, and the market is divided into two types: the replacement market and the new clothing market. The replacement market refers to the replacement of old locks with new locks. The new market is also called the engineering market, mainly for real estate projects. Office smart lock: Office locks need to ensure the flow rate of personnel. Generally, remote text message service unlocking and attendance management will be added on the basis of home locks. The attendance function can be used instead of the attendance machine, and the office lock is usually equipped with a special attendance analysis software for the enterprise. When the data is imported from the lock into the software, all the attendance records will be automatically analyzed. Apartment smart lock: The biggest problem that the apartment needs to solve is key management. The biggest difference from other locks is that it has a complete apartment management system, which can manage tenants, manage rooms, manage water and electricity meters, and control rent payments.