White dove music aid is a small program of public welfare assistance, which mainly helps the disabled, the elderly and pregnant women with difficulties and physical inconvenience. At the same time, it provides a love platform for volunteers who are interested in participating in public welfare undertakings. With the support of the party and the state, the development of public welfare undertakings in China is getting better and better, but it is also faced with some problems, such as how to help, where to help, what things can be helped, and so on. White Pigeon Lezhu came into being. It is a comprehensive service platform integrating assistance, knowledge quiz and article browsing, which is respectively aimed at users and volunteers in need. Users can post their difficulties in "I need", while volunteers can find tasks that are suitable for them in "I can. Through this task design, we reasonably meet the needs of two types of users, so that everyone can easily participate in public welfare undertakings. 2. User functional requirements After the user enters the White Pigeon Music Help applet, the following functions can be realized: Home page: contains functional modules (I can, I need, knowledge question and answer, affairs hall, activity hall), article recommendation, bottom functional area (home page, news, mine) and suspended plus sign (used to publish I can, article and I need). I can: Users can publish information that they can provide help, including ID, release time, demand content, and subject content. I need: users can view the help information published by other users, including ID, publication time, demand content and the status, difficulty and urgency of related work orders. Knowledge Q & A: Ten multiple-choice questions are provided to facilitate users to accumulate knowledge and learn during the service process. Affairs hall: divided into "I can" and "I need" two parts, the function is the same as above. Activity hall: users can choose suitable activities according to the activity content published by the publisher and their own needs. Article Recommendation: To meet the diverse needs of users, you can praise and share operations. Suspension plus sign: provides the function of publishing what I can, articles and what I need. My Information: Users can view and edit their basic information to meet personalized needs. Authoring records: Displays all authoring records of the user on the platform. Help records: displays all help records of a user on the platform. Activity records: Presents all activity participation records of the user on the platform. Contact customer service: users can communicate directly with customer service and get support for problem solving. Problem feedback: three types of abnormal feedback, product suggestions and illegal reports are provided, and users can give corresponding feedback according to the actual situation. 3. Manage functional requirements After the administrator logs in, the main function modules include: Home page: displays the current time, the two-dimensional code of the White Pigeon Happy Help applet, the real-time data of the activities of the service hall and the overview of the White Pigeon Happy Help data. Permission: carousel control, the administrator can delete and add carousel, and display the added time and picture of the added carousel. Deletion and addition of event halls: Administrators can delete and add events, and display the publishing time, publisher, title and content of each event. View and delete the article list: the administrator can delete and view the articles published by users, and display the publishing time, publisher ID and name of each article, as well as the title and content of the article. View and delete what I need: the administrator can delete the "I need" published by the user, and display the publishing time, status, emergency, difficulty, ID and name of the publisher and helper information of "I need. I can view and delete: the administrator can delete the "I can" published by the user, and display the "I can" publishing time, subject, content, and the ID and name of the publisher. Add and delete knowledge questions and answers: administrators can add and delete questions in the question bank, and display questions, answers, analysis and options.