First of all, you must let him know that hitting people is wrong. Secondly, we should encourage him more, especially in front of others, and often say that my son is very nice and he doesn't want other children. He always loves to hit people, and he never hits people.

Children are smooth donkeys.

All children are donkeys.

Divert attention

Also, when he hits someone, it's best to divert his attention immediately. Two-year-olds haven't the ability to tell right from wrong yet. You just need to tell him properly. Too much discipline is useless.

Correct expression

Your attitude is very important, so you should pay attention to your expression. At this time, children are sometimes in a hurry because they are not fluent. Usually be careful not to let him worry too much. Once he is in a hurry, we should enlighten him and let him have a correct expression.