Teaching and training institutions to launch a circle of friends is a model of casting a wide net, which can be done if the budget is sufficient; The cost of enrollment is a place that colleges and universities must focus on. Therefore, other more cost-effective delivery methods can be used. Self-built WeChat online teaching platform is a good choice. Many people will think that the cost is high and the cycle is long. Actually, it is not. The current practice is to directly apply the ready-made small program H5 template and go online in a week or so.