The applet is an application that can be used without a downloading installation. It fulfils the dream that the application can reach the tentacle, and the user can open the application by sweeping or searching. It also embodies the idea of leaving after all, and users do not have to worry about whether to install too many applications. Applications will be everywhere and readily available, but will not need to be loaded. According to the technical interface between the above-mentioned official presentation and the small program, the small program is actually a light application that is highly functional and simple. Different applets perform different functions. For example, the purchase of film tickets, restaurant platoon numbers, restaurant orders, bus searches, stock information, weather checks, radio stations, hotel reservations, shared bicycles, cabling, exchange rate checks, word checks, air tickets, internet purchases... Of course, as a new product of wi-fi, small programs ca...