The earliest pottery ding was only used as a cooker for cooking food.
With the progress of society and the development of bronze technology, bronze ding gradually appeared, and at this time, bronze ding appeared in some wealthy families. But its function is still a cooker for cooking food.
In the later period, the tripod gradually evolved into a sacrificial object, which was a symbol of kingship from the beginning of sacrifice.
Because of social norms, the norms of all classes have been gradually fixed in the text.