Besides, according to the word of mouth of Shaanxi opera fans, Li Yannian is very familiar with opera music and has made many contributions. The original preface of Guo (not adopted when Shanxi People's Publishing House 1955 officially published Music of Jin Opera) can be used as evidence: "In between (1930, 193 1), I made friends with Xu Gou and indirectly borrowed a musician. See Zhao Yu Chunqiu, edited by Lu Runjie, Shaanxi Ancient Books Publishing House, p. 322. Guo (1911-1954) was named and given the word first. Xia Jiabao, a native of Qixian County, taught in Wangda Village, Xugou County in the 1930s. He often discusses traditional Chinese opera with Ren, Ma Bulong, Zhao Nianzhu and Yang Shouguang. He has accumulated a box of music materials of Jin Opera, so some people say that he is "doing nothing".