"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 function, according to the statement of "Zhou Li·Diguan·Drumman", it is: "Drums are made with Jinduo. "According to Zheng Xuan's annotations, it is known: "Duo, a big bell is also a drum." As for the person in charge of Zhenduo, according to "Zhou Li·Xiaguan·Da Sima", it is "Sima Zhenduo". Jia Gongyan further explained: "This is the golden bell and the golden tongue, so it is called Jin Duo. In the army, the wooden tongue of the golden bell is called Mu Duo, and it is roused when giving orders." As for the saying of "tong drum", Jia Shu It is believed that "two Sima Zhenduo, the generals below will beat the drums, so Yuntong drums". And according to the annotation of "Shuowen", "Tong, Da also". Sun Yirang thought: "The drummer is not one person, so Zhenduo ordered one person to drum first, and everyone drummed." In any case, from the records of "Zhou Li, Xiaguan, Da Sima", drumming and Zhenduo should indeed be the same. are closely connected. For example, "Three drums Zhenduo"; "Every drummer has three drums, and two Sima Zhenduo" and so on, all of which can be clearly seen.

However, this kind of rule that the drums are used to tune the drums seems to be no longer popular in the late Spring and Autumn Period. For example, "Mandarin Wuyu" has it: "Wang Naibing, when the bell is tolled, drums Dingning, Chunyu, Zhenduo, brave and timid all. Yes, the three armies are all clamoring, and the deduction is used to shake the brigade, and its sound moves the world." Judging from this text, it seems that various war drums and instruments were launched together with the sound of clamor, and there was no difference in order. Or, it is unknown whether this is a manifestation of "destruction of rituals and music".
According to the "Analects of Confucius", an official sighed after seeing Confucius: "The world has been without Tao for a long time, and the heaven will take the Master as Mu Duo." As a result, Mu Duo became a symbol of teachers and education in later generations. Normal colleges and universities such as Beijing Normal University, Northwest Normal University, National Taiwan Normal University, Qufu Normal University, Gannan Normal University, and National Changhua Normal University all use the symbol of Muduo on their school badges. The Ministry of Education of the Republic of China named the award given to outstanding teachers as the "Teacher Award".