What is the slogan of ancient disciples learning from their teachers?

At the earliest time, students must pay tribute to their teachers with the same ceremony as their parents. The ancients believed that not kneeling meant not worshiping. Worship means to salute in ancient times. According to the etiquette of the Zhou Dynasty, there were strict regulations on the actions and objects of bowing at that time, and * * * was divided into kowtowing, nodding and empty worship, which was called "formal bowing". When worshipping, worshippers must kneel on the ground, press their left hand on their right hand and support themselves 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". Generally used for courtiers to visit the king and worship their ancestors. When curtseying, it is the same as kowtowing, except that different people have to kowtow when they bow down and their foreheads touch the ground. Generally used to salute from bottom to top. Children bow to their parents and elders, and students bow to their teachers. After the Han Dynasty, people's daily life changed, and people added long salutes. When bowing, the left hand presses the right hand (the woman's right hand presses the left hand), the hand is hidden in the sleeve, the hand is raised, bowing 90 degrees, and then getting up. At the same time, the hand followed Qi Mei again, and then the hand was put down. Bowing is the respect of the younger generation to the elders, and it is also the habit of students greeting their teachers.