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Human personality is different in early childhood, adolescence, adolescence, middle age, and old age.

  When a person enters the society, his personality is constantly changing after he joins the work, from the novice to the backbone, from the inferior to the superior, from work to retirement. In this change, you can see many characteristics of different blood types.

  Type A people are more headstrong when they are young, and they are determined and determined when they are young, and they are always strong everywhere. After entering society, as they grow older and accumulate social experience, they begin to restrain their emotions, show a steady and humble attitude, and tend to become cautious who are unwilling to overexpress themselves. Type A people are very stubborn in old age.   

  Type B people's congresses have a naive and romantic infancy. As they grow older, they are gradually divided into two tendencies: outspoken and not good at socializing. Type B people have little change in their personalities since they were young, and relatively speaking, people feel that they live younger and younger.

  Type O people are more docile when they are young, but as they grow older, they will actively show strong self-assertion and self-expression, and even become very courageous people. O-type people have the biggest changes from childhood to old age. They are usually the docile teenagers and the tough ones when they grow old.

  Most of the AB people are afraid of strangers when they are young and are very closed, but they are good at making friends and socializing widely when they grow up. Type AB people are easily complacent because they are overconfident, and they feel very arrogant in old age.