The main clients of the current smart lock are the apartment market and the short-lease market, especially if it solves the problem of short-lease landlords. At present, there are a large number of short-rent sites in the market, such as hogs, ants, airbnb, etc., where landlords can rent their vacant houses for short periods. However, because of the short duration of the tenant's lease, the landlord is required to exchange the key frequently and even to change the lock for safety, which is time-consuming and labour-intensive. In the case of smart door locks, lease expirys or disputes, the landlord can change the door key remotely by mobile phone. In this way, when the old tenants leave, the new tenants stay and the daily cleaning, the landlord saves the cumbersome process of meeting the key. Group-up smart locks – low-cost strategies to reshape the market, whether by selling to c-based home users or working with b-end long-rent short-lease apartments, will inevitably face a la...