Depending on the situation, in the case of one-on-one teaching, the teacher's load is 20-30, and in the case of large classes, it is generally about 80. Musical instrument store is a commercial activity integrating musical instrument sales and training. In western developed countries, the proportion of people who master a musical instrument reaches more than 10% of the total population. In recent years, with the improvement of China's material living standards, people's demand for cultural life has risen sharply, and the development of musical instruments has mushroomed, which has greatly promoted the improvement of the quality of the whole people, the prosperity of social and cultural undertakings, and the promotion of aesthetic education for young people.