Having a second child doesn't care about the big one? It's no good beating his sister all the time. How did the small one get too big? Tell the younger one that it's wrong not to hit his sister. Persuade him. Communicate with the second child slowly, and you can't always let him work so hard. Tell him to ignore her if he doesn't listen and don't buy him food. Communicate with him well, and he will gradually understand. He can't beat two, and the more he fights, the worse it gets. Now that he is young, he will understand when he is old. I wish her two sisters better and better.