The main contents and requirements of WeChat applet book lending system; Use ibeacon to achieve accurate positioning, and use path navigation algorithm to plan the shortest path. Optimize the native API and use Tencent Cloud platform to realize the dynamic update of book borrowing information. Through the framework and components of WeChat applet, the operation of ibeacon is simplified, the operation interface is beautified and simplified, the operation of the lending system is simplified, and the running time of the system is saved. Requirements: the content is substantial and correct, closely related to the theme, clear in structure and strong in logic. The writing format must conform to the provisions of the graduation design specification.