We will changes over the time, place, is mainly because the character could be affected in the outside.Through the blood relationship, we can preliminarily predicts a person's personality change, you can also prophecy!

　　Type A blood,people(Blood type and personality /xx/)

Type A person is just the opposite and type O people.Fortitude character when I was younger, stronger everywhere, to the society, accommodating the growth of the age, they began to restrain themselves, show the steady modest manner, is easy to become reluctant to err on the side of caution.Generally in age, however, and more stubborn.