The Gan family is known as the "family of opera", and Gang Gongsan is the core figure of the "family of opera". Gan Gongsan is Gan Xin (1889-1969), who graduated from the Economics Department of the University of Political Science and Law in his early years. Adhering to the legacy of his ancestors, he was humble and generous, and was deeply respected by his neighbors. Mr. Gan is proficient in poetry, calligraphy, painting, opera and music, and is even more proficient in rhythm. He is good at sheng, xiao and flute in folk music. He is good at sanxian and pipa among plucked instruments. He is particularly fond of Kun Opera. He once invited Xie Kunquan, a veteran Kun opera artist, to learn Kun opera. Amateur Kunqu Opera artist. His original name was Gan Xin, with the courtesy name Gongsan and Yixing, a native of Nanjing. The Gan family was a prominent family in Jinling. Their ancestor Gan Xi (author of "Bai Xia Suo Yan" and other books) built the "Jinda Tower" during the Daoguang period of the Qing Dynasty and collected hundreds of thousands of books. Gongsan studied economics at Hosei University in the early years of the Republic of China. He has been fond of drama and music since childhood, including Taoist music, and is proficient in sheng, Xiao, flute, sanxian, and pipa. He is especially fond of Kun Opera and studied under the veteran artist Xie Kunquan. Later, famous teachers Shi Guilin, You Caiyun (an artist from the Quanfu Class), and flute master Li Jinshou were invited to teach their children, daughters, nephews, and grandchildren how to sing at home. He specializes in Laosheng's singing style, with a high and vigorous voice and strong and concise accents. He is good at singing "Tanci", "Restaurant", "Feng Wang" and other songs. In the early 1930s, he studied Kun Opera with Qiu Laizhi, Wu Mei and others at the same time, and jointly organized the Zixia Society. Later, the Gongyu Party Club was established, and he served as the leader of the Kunqu Opera Group and became friends with Pu Dong. He was also appointed as a member of the Central Cultural Planning Commission. In 1935, he recorded Kunqu opera records "Sweep the Song" and "Ji Zi" (in collaboration with Zhang Shanxiang) at Shanghai EMI Company. In the early days of the Anti-Japanese War, he went to Chongqing to establish the Chongqing Opera Society with Mu Ouchu, Xiang Xinwu, Ni Zongyang, Zhang Chonghe, etc., and expanded the Chongqing Opera Society with Fan Chongshi, Zhang Yuanshan, etc., and assisted the Sichuan Wutongqiao Salt Administration to establish an amateur Kunqu Opera organization. In 1942, he was employed as a Kunqu opera teacher at Chongqing Normal School in Beibei. After the victory of the Anti-Japanese War, he returned to Nanjing. In 1946, he served as a Kunqu Opera teacher at Jiangning Normal School. At the same time, he restored the Zixia Club and held monthly concerts at his home in Nanbaiting. Cao Tianshou, Wu Nanqing and others came to participate. Well-known figures in the literary and art circles such as Lu En, Luo Huilan, Yan Fengying, Gu Tiehua, etc. have all been personally taught by him. He is erudite and talented, and is also good at poetry, calligraphy, and proficient in music. In his early years, he studied Kunqu opera rhyme scores and Shiban Luo and Drums together with Wu Mei, Pu Dong and others, and accumulated a lot of information and articles. In order to solve the problem of young people not knowing the Gongchi score, he spent several years translating the Gongchi score of more than a hundred plays into simplified scores. After liberation, he donated the ancestral "Jindao Tower" collection of books together with hundreds of imitation Song woodcuts of "Baixia Suoyan" and "Jiankang Shilu" to the Nanjing Library for free. In 1954, he founded the Kunqu Opera Group of the Nanjing Music Society, uniting a group of music lovers in the Nanjing area. In 1957, when he was nearly 70 years old, he recorded ten flute tunes at Jiangsu Radio Station. The sound of the flutes was as loud as before.