In addition to playing, instrumental music teaching is music theory. Playing is a skill or expressive force, while theory is a horizontal development. Without the support of theory, it is difficult to reach a certain height and level, because both works and comprehensive things need the support of theory, so theory plus practice is also playing with skills. So you should turn your knowledge and theory of play into something that can be taught to students, and use professional books to teach. While teaching and playing, Cheng should strengthen the cultivation of musical theory in order to teach well. It is best to teach one-on-one theory and implement large class system, so as to balance knowledge points and strengthen the theory needed for future performances. Because all the actual performances are theory and practice, teaching according to your own mastery of music should be within your power, so there should be no problem. I wish you success! Thank you.