常见的大钟有三种类别，唐朝时期的"平直形"钟口铜钟，唐宋时期的"浅波形"钟口铜钟，以及明清时期的"喇叭形"钟口铜钟。明清时期大钟的钟壁在钟口处都有外扩，呈现出所谓的"喇叭形";铜钟的壁厚，由唐钟的均匀分布，演变为从上往下逐渐增厚，避免了早期大钟重击易裂的缺点。钟有特钟和编钟之别，特别人的钟叫特钟，能单独的悬在架上。成组依大小次序悬在一个架上的是编钟，大小和它的高低音有关系，有的十六个为一组。现存的钟有西周初期以至春秋战国时期的，战国较盛行。钟用木槌敲击演奏，考古发现的编钟，有槌同时出土。钟的形制有两种，一种是带高的筒形纽，钟的下口两边突出如月牙形;另一种上端的纽是扁的，有的纽作伏兽形，钟下口是平的。一般钟的花纹两边相同，每边大率有六排(每排三个)共十八个突出的乳。乳的形状有突出如柱的，有突出作螺旋形的。有"乳"的点缀，是钟区别于钲、饶、铎、铃等的特点。铜缸

There are three kinds of common bells: flat bell-mouth copper bell in Tang Dynasty, shallow waveform bell-mouth copper bell in Tang and Song Dynasty, and trumpet-shaped bell-mouth copper bell in Ming and Qing Dynasties. In the Ming and Qing Dynasties, the bell wall of the bell expanded outside the bell mouth, showing the so-called "trumpet-shaped". The wall thickness of the copper bell changed from uniform distribution of the Tang bell to gradual thickening from top to bottom, avoiding the shortcomings of heavy hitting and cracking of the early bell. Clocks are different from clocks. Special clocks are called special clocks, which can be suspended separately on a rack. Groups of bells are suspended on a rack in order of size. Size is related to its bass and bass. Some sixteen are grouped together. The existing bells were from the early Western Zhou Dynasty to the Spring and Autumn Period and the Warring States Period. The Warring States Period was more prevalent. The bells are played with mallets. Archaeologically discovered chimes are unearthed with mallets at the same time. There are two kinds of bell shapes, one is a high cylinder button, the lower edge of the bell protrudes like crescent; the other is flat, some of the buttons are volcanic beast, the lower edge of the bell is flat. The pattern of a general clock is the same on both sides. There are six rows (three in each row) with eighteen prominent milk on each side. The shape of milk is prominent as a column, and prominent as a spiral. The embellishment of "milk" is the distinguishing feature of bells from bowls, rao, duo and bells.