Ah-Dai remembered that every long time, a person named Brother would come to the house, and every time that person came, Ah-Dai would run outside and hide, watching the door from a distance and waiting for that person to leave before daring to go home. That person never stayed for more than a day and left in a hurry.
Dumb asked his mother, what is brother? The stupid mother said that you are all my sons. He was born before you, so he is your brother. Dui seemed to understand, but he didn't know that person, and the word "brother" was unfamiliar to him.