rigorous and relaxed. Rigidity refers to the study, that is, the teacher's explanation of Zhihu's theory and the actual drills of some techniques, which is very rigorous. Even with strength and location, I will teach carefully and learn quickly. Relaxation refers to the mentality, that is, studying here will not be very stressful. On the one hand, teachers are easy to get along with, and on the other hand, as long as you really understand what the teacher said, you can graduate smoothly after almost thirty or forty years, and then you will still be the kind of job assignment.