Jugongli is a kind of communication etiquette in ancient times. In the past, it was used for the longest time and the most times. The ancients thought that you should not kneel or worship. Worship means salute in ancient times. According to the etiquette of the Zhou Dynasty, there were strict regulations on the movements and objects of bowing. Bowing ceremony is divided into kowtowing, nodding and empty worship, which is called "formal worship". When worshipping, worshippers must kneel on the ground, press their left hands on their right hands and support them on the ground. Then, he slowly kowtowed to the ground and stayed for a long time, putting his hands in front of his knees and his head behind his hands. This is the most important etiquette in "Nine Worship". It is generally used for courtiers to visit the king and worship their ancestors.