There are two types of cymbals in ancient times. One refers to the "cymbals" in the Yin and Zhou dynasties (different from the cymbals called cymbals now), "Shuowen": "zheng, cymbals, like bells, in the handle, up and down." Actually The zheng and cymbal at that time were different in shape. Zheng is used in military affairs, see Li You's "Inscriptions on Zheng" of the Later Han Dynasty: "Shen...