When taking the art test, erhu as the main item has two test methods. One is: if you are taking musicology (also called music education), erhu is the main item, and vocal music must be an auxiliary item (dance can't be used instead). At the same time, you have to take solfeggio, listening and music theory. Because your future career is music education, that is, being a music teacher, you will have high requirements for your overall music quality, and the erhu level is above the middle level.
The second is to test music performance, only the main items of erhu and the theory of solfeggio and listening to music. There is no so-called sideline, and the demand for erhu is very high, because the future career is performance.
At present, there is still an exam that does not test skills, but only tests theory. For example, the music and literature major of Tianjin Normal University only tests music theory and music history.
The landlord should work hard according to his own situation. Good luck.