Introduction to the blogger: Author of the books "Introduction to Vue.js and Practical Mall Development" and "WeChat Mini Program Mall Development", CSDN blog expert, online education expert, CSDN Diamond Lecturer; focusing on graduation design education and tutoring for college students.

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Purpose: The main goal of this project is to design and implement a campus second-hand transaction applet system based on WeChat. Front-end users use the applet, and back-end management uses a B/S architecture based on PHP+MySql; through the back-end management of information, member management, and category management , transaction information management, message management, etc. Users can log in through the mini program to view the latest announcement information of the platform, publish their own transaction information, etc.

Significance: The campus second-hand transaction applet system based on WeChat is a product of the combination of computer technology and market transaction management. Through the applet intra-city transaction information system, efficient management of transaction information is achieved. With the continuous improvement of computer technology, computers have penetrated into every corner of social life. However, the method of manually managing and publishing transaction information is not only inefficient, error-prone, cumbersome, but also consumes a lot of manpower. In order to satisfy the market management personnel's management of transaction information, announcement information management, and trading personnel, on the premise that the market management staff have certain computer operation capabilities, this intra-city trading information system software based on small programs is specially compiled to improve trading. Information management efficiency.