The course system we adopted was developed by the famous Waterford College in the United States for more than 5 years, so the whole course 180 hours was verified in one academic year. In order to complete the teaching content, achieve our teaching objectives, cultivate children's English thinking and improve their all-round ability, we must have time to ensure that 180 class hours is our basic guarantee. And our single class is only 85 yuan a class, which is not expensive.