"Zuo Zhuan: Xianggong Fourteen Years": "Therefore, the "Xiashu" said: 'The people used wood duo to walk on the road'". Note: "Qiu Ren, the official of the order. Mu Duo, the wooden tongue and the golden bell." The duo was a wartime musical instrument. For example, in "Mandarin Wuyu": "The heads of the line are all officials and teachers, and Duo Gongji is supported..." As for its specific func...