first of all, you should understand the fact that people who can sing may not know music. There are too many singers in China who only know how to sing and how to sing with skills, but when it comes to music knowledge in music theory, they are still dumbfounded. Of course, some singers can compose, arrange and sing by themselves, while others are only responsible for singing, and he can only sing because he doesn't know music theory. That is to say, he can only understand why the lyrics of this sentence are written like this, but he doesn't understand what music theory knowledge and harmony theory are used in this accompaniment, so the difference between people who know music and those who can sing but don't know music is obvious. As for those who know music and those who can't even sing, the difference is big, which can be said to be people from two worlds. Finally, it is not that whoever sings well in a KTV will say that he knows music. Even the most superficial knowledge of music can't be learned in one day. If you want to get along in the field of music, you need to study modestly all your life. Learning music can really help you learn many things that you can't learn in other aspects, so I think your concept has changed a little now.