Zuo Mumu didn't know why he took up the profession of being a teacher. It was just because of his mother's words Mumu, "Teacher, it's so easy to find a boyfriend. You're not good-looking. If you don't become a teacher, you won't be able to find a partner. If you don't find a partner, you won't be able to have a baby. You won't be able to have a baby." Baby, your mother, I don't have any grandchildren to play with. Without grandchildren to play with, I can't compare to Old Man Zhang next door, next door, next door, next door. If I can't compare to Old Man Zhang, your mother will make me unhappy. When your mother makes me unhappy, I will think of you. This is not a good teacher. . . . .
Zuo Mumu never thought that after she became a teacher and found a partner, her mother was still unhappy because she was still not as good as the granddaughter of Old Man Zhang who was next door to him.