There are quite a few musical instruments in Weihai. I bought one near Tashan, and it still works after five or six years. If you are in the city, go to the place opposite the city government. There seem to be two music shops next to it. If it is in the economic zone, I know there is a crown musical instrument store in Crown Community. The high area is not clear. I remember there was a Spanish musical instrument store on Shichang Avenue that sold folk music, but I forgot to sell erhu.