A person's personality is different in early childhood, adolescence, youth, middle age, and old age.
When a person enters society and starts working, they progress from being a novice to becoming a key player, from being a subordinate to becoming a superior, and work until retirement. During this time, their personality also continues to change. In this process of change, many characteristics of different blood types can be seen.
People with blood type A were more capricious when they were young, and decisive and tough when they were young adults, always striving to be the best in everything they do. After entering society, as they grow older and accumulate social experience, they begin to control their emotions and show a steady and humble attitude, easily becoming cautious people who don't like to overly express themselves. People with blood type A tend to become very stubborn in old age.
Most people with blood type B have a天真romantic childhood, and as they grow older, they gradually split into two tendencies: straightforward and not good at socializing. Since the personality of people with blood type B changes little from childhood to old age, they may seem to stay young relatively.
People with blood type O are relatively gentle when they are young, but as they grow older, they will actively show strong self-assertiveness and self-expression, even becoming very decisive individuals. The change in people with blood type O from young to old is the greatest; they are often gentle when young and become more forceful as they age.
Most people with blood type AB are afraid of strangers when they are children and are quite introverted, but after growing up, they are good at making friends and have extensive social networks. People with blood type AB, due to excessive confidence, are prone to complacency, and in old age, they may appear arrogant.