You only learned violin as a professional in your third year of junior high school? It’s not that I’m trying to hit you, there’s really no hope at all. To truly learn the violin professionally, you must start learning at the age of 3 or 4. By the age of 15, you have already won awards all over the country. If you are studying professionally, audio-visual, singing and ear training are necessary, but you are already 15 or 16 years old, your knuckles have already developed, and you cannot move as professionally as a child anyway, and you have also passed the audio-visual and singing training. It’s the best age for your ears. If you start learning at this age, no matter how hard you try, you will never be successful in the violin profession