Why do people who play erhu must be blind?

Since all erhu players are like you said, there is only one possibility. They are all liars. They pretend to be blind, the more pathetic the better. Then they begged. Some people think of the only way to earn money without working to get people's sympathy. What's more, some swindlers always pester others for money when they see that they are so cheap. In fact, when they turn their backs and return to normal, they may dress better than many people. You said erhu should belong to it. As for such people, they are blind, hehe, because no blind A Bing has played the erhu all his life, and even those who play the erhu by the roadside and beg for a miserable life should be imitating A Bing. ...