1, first look at the proficiency, and at the same time look at whether it is professional or amateur. As far as professionalism is concerned, it is also graded. Whether it is primary, intermediate, advanced or relatively smooth, it makes people feel comfortable to play.

2, naturally, this comparison, mastering many things, high level, can be said to be a master.

Just like that Go, it has nine stages and is the highest, but after nine stages, do you dare to say it is the best in the world? There must be something more advanced, and so is the flute, which is also divided into primary, intermediate and advanced. The words of professional musicians are hard to measure. There is no standard for this. Every musician has his own specialty and unique style.