The significance of this society is too deep. What is the standard in your mind? Some people think that if you can play some simple POPs, you can practice for about three years every day. I can only say that you understand what a teacher can give you, and there are many unknown factors that affect the level. Three years can be conservative. Endless. I am now 10 years old. I dare not say that I learned it from three hours a day. I don't think it can be done in 50 years according to my current knowledge. There is no end to musical instruments. There are always some things that I have never touched or thought of. When you are in love, you are happy all your life. Let's go