(Human body structure and social environment determine human physiological functions and psychological activities, and these functions and activities affect the external representation and performance behavior of the human body. Therefore, from these external representations and various activity and behavior phenomena, we can summarize some types according to certain statistical laws, and reason and analyze the relationship between each type and human physiological and psychological activities, so as to understand human behavior. . 39;s Internal active state. This is also the birthplace of the ancient "face theory". There is a certain basis. Therefore, through the performance of the head, we can "read" the inner activities of people to a certain extent.)