于是我国古代的一种青铜乐器。史书最早记载见于《周礼·地官·鼓人》：“以金锌和鼓”郑玄注曰：“，于也，圆如雄头，大上小下，乐作鸣之，与鼓相和。”《国语·晋语》曰：“战以于，于宁，做其民也”。又《吴语》：“王乃秉，亲就鸣钟，了宁、于、振铎、勇怯尽应。”可见于 So ancient China, a bronze musical instrument. The earliest record of history books found in “Zhou official to the drummer”: “to the zinc and drum” Zheng Xuan note said: “In Yu, round as the head, big and small, music for the Ming, and Drum and . ”“ Mandarin Jin language ”said:“ war in, Yu Ning, do their people also. ” And “Wu language”: “Wang Naibing, the pro-chime bell, Ning, Yu, Tudor, courage and fear.” Can be seen in