Is a clock an instrument with its mouth closed?

The clock is not a closed instrument, but a percussion instrument.

The earliest Zhong Yuan refers to the traditional percussion instrument of ancient Han nationality, which is flat and hollow. During the Spring and Autumn Period and the Warring States Period to the Qin and Han Dynasties, bronze was used as the main material, also known as chimes. After Buddhism was introduced into China, it gradually became synonymous with a religious musical instrument, also called Brahma Bell or Half Bell. Originally, it was called "Miao Zi" and "Heart Drum", which was used to tell time and belief drums in temples.

basic configuration

According to the records in Shi Ben, Li Ji, Lv Chunqiu and Shan Hai Jing, this clock was made by Cui, Gu, Yan and Ling Lun, which shows that it has a long history. Among archaeological discoveries, there are primitive "pottery clocks".

The pottery clock of Yangshao Cultural Site in Miaodigou, Shan County, Henan Province (3900-3000 BC) is made of fine clay red pottery, simple and unpretentious, with a handle, about 9 meters high and 5 centimeters in diameter. There are small holes on both sides of the shoulder that communicate with the inner cavity, or it may be a bell that can tie the tongue. The pottery clock of Longshan Cultural Site in Keshengzhuang, Chang 'an County, Shaanxi Province (2800-2000 BC) is rectangular in shape and has a solid handle, which looks like a Shang Dynasty cymbal.