How to deal with a 1.5-year-old baby who likes to hit?

Patient's question:

No

Doctor's answer:

Hitting others is an aggressive behavior, often common among children around two years old (your baby is ahead of schedule, haha), especially boys, or it can be said to be a characteristic of children at this age. However, it cannot predict a child's future behavior. For example, early aggressive children do not necessarily grow up to be cruel or violent.
Why do children at this age like to hit? The reasons are multifaceted:
Self-awareness begins to develop, and everything revolves around "me." If something doesn't suit me, I don't want it, and I won't do it. So, I resort to physical means to "exclude" things I don't want or like, which is essentially hitting.
Their skills in interacting with other children are poor. If they want something and it's not given to them, they don't know how to ask, so they resort to hitting.
Their language expression skills are poor. They can't clearly articulate their thoughts or requests, and when others don't comply, they get upset and hit.
They enjoy watching other children cry after being hit, lacking empathy.
They see adults hitting in movies or TV shows and think it's fun, so they imitate it.
Parents spoil them. When they start hitting, they are not strictlyed, which forms a habit.