On the one hand, online time is flexible, free and can be arranged freely. A class lasts about 25 minutes, so it's easy to stick to it. Learning English should be short-term and high-frequency, and it is to make full use of fragmented time. Secondly, it can save a lot of time and travel expenses (the market price of oral English training is 5000 to 10000) by breaking the geographical restrictions and studying anytime and anywhere without going back and forth, which is affordable for many families and easier to stick to.