There are two ways to compound the invention comb. One is a man named He Lian around Emperor Yan, who imitated human five fingers with animal bones and made a five-finger comb for Emperor Yan. Emperor Yan was very happy and asked him to improve the comb and spread it from now on. The second theory is that Lei Fang's hair became smooth when he accidentally stroked it with fishbone during the period of the Yellow Emperor. Later, he asked a carpenter to make a fishbone out of bamboo and began to use a comb. In fact, in our daily life, there are many things that hide the great wisdom of the ancients.