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The
  strengths of 〖AB type〗are keen thinking, careful observation, enthusiasm, earnestness, compassion and self-sacrifice, and good at reflection. Impatient temperament, capriciousness, melancholy, love to complain, etc. are the shortcomings of blood type AB . Two-way temperament, that is, both introverted temperament and extroverted temperament. This is difficult even for them to control. When the two-way state cannot be maintained, the shortcomings will appear.

〖B type〗
  calm, cheerful, active, sensitive, cheerful, social, enthusiastic, happy, active, etc., are all the advantages of type B blood . The shortcomings of type B blood people are the lack of permanence, the lack of persistence, the boldness, the lack of prudence, the exaggeration, the eloquent, the demonstrative, and the weak-willed. One of the characteristics of blood type B temperament is freedom.
 
〖Type A〗The advantages of type
  A blood people are docile, prudent, careful, humble, self-reflection, rich in feelings, compassion, sacrifice, harmony, melancholy, etc. The shortcomings of type A blood people are worrying, emotional, weak-willed, indecisive, withdrawn, non-social, shy, pessimistic, shameful, self-deceptive, etc. The temperament characteristic of blood type A is "defensive".

〖O type〗
  Strong will, full of self-confidence, sensible, clear thinking, calm in situations, energetic, practical ability, etc., are all the advantages of O type blood . Stubborn temperament, not easy-going enough, indifferent to others, not modest enough, personal supremacy, informality, poor manners, etc., these are the shortcomings of type O blood.