What are the outer strings of Henan pendants and beards?

D 1. In Henan, strings are usually set according to the needs of music or the habits of players. In a band, the inner string is usually set to a, and the outer string is set to d 1, and the pitch difference between the two strings is pure four degrees. Tribal Tiger is a stringed instrument in China, also known as Quhu and Er string, which is mainly spread in Henan and Shandong. It is the main accompaniment instrument of Henan Quju Opera, Shandong Opera and Shandong Opera. Tribal Tiger's predecessor was Xiao Sanxian. When accompanying rap and traditional Chinese opera, the artist found it difficult to match the effect of plucked instruments with singing properly, so he imitated the huqin and played it with a ponytail bow, replacing the drum with the barrel of the huqin.