Who am I in 20 is a kind of self-questioning and self-answering. When you are asked what kind of person you are, the answers you get are all kinds of ideas about yourself that appear in your mind.

There is an activity in the mental health class. The teacher will ask the students to find a blank piece of paper and write down 20 who am I? The ultimate goal of "20 Who am I" activity is to let students know themselves and what kind of person they are.

Some students are writing "20 who am I?" When, can write: 1, I am a woman; 2. I am a good daughter of my mother; 3. She is a beautiful girl; 4. I am a college student; 5. I am a cheerful person. ......

The physiological self is the cognition of one's own physiological attributes. For example, I am a woman, which is the cognition of gender. Physiological cognition also includes the cognition of height, appearance, weight, figure and physical fitness. It can be seen that these cognitions exist objectively. For example: I am a beautiful girl, I am fat and so on.

Social self is the view of one's role, position, function and rights in social relations. For example: I am my mother's daughter, and I am the most popular person in the dormitory.

Psychological self is an individual's cognition of his own ability, personality, temperament, interest, hobby, emotion, will and knowledge. For example, I am a kind person and I like sports.