The earliest Zhong Yuan refers to the percussion instrument of Han nationality in ancient China, which is flat and hollow. It originated in Shang Dynasty and was mostly made of bronze. It is also called chime. After Buddhism was introduced into China, it gradually became synonymous with a religious musical instrument, also called Brahma Bell or Half Bell. Initially, it was called "Zhang Zhi" and "Letter Drum", which was a temple to tell time and gather people.