Bowing on knees, a kind of etiquette invented by Chinese people, is also an important invention. It is said that foreign countries did not have this behavior before, but they learned it later. Its meaning is profound, and there are different meanings only from the perspective of emotional color. The first is positive, such as worship, gratitude and respect; the second is negative, such as begging, apologizing and repenting. There is also a neutral one, which means humiliation and mourning. Bowing on knees is also called kowtowing. Modern Chinese Dictionary explains it as an old-fashioned etiquette, to knock one's head on the ground. For example, three bows and nine kowtows. However, in the entertainment circle, bowing on knees seems to have formed a fashion. As for whether it is positive or negative, or neutral, no one understands it. Maybe only those who bow on knees know their own behaviors and thoughts clearly. Not long ago, famous host Zhu Jun performed "bowing on knees" under the leadership of Chow Yun-fat. This originally profound behavior has become an easy-to-come "performance" for people in the entertainment circle. I do not know whether it is the decline of traditional etiquette or others' sinister intentions.