The training institutions under the APP line set up the internal ecological circle of parents, teachers, students, potential students and parents, making the customer more sticky. The main idea of learning group is to enable parents and students to interact with each other, help training institutions to set up offline training + online training, answering questions of O2O integrated services, while improving services, at the same time, it can also increase extra income. We will provide many kinds of activities, such as turntable raffle, registration, discount, red envelopes in a limited time, and customize development activities according to the needs of institutions, so that offline training institutions can "get online" at extremely low cost.