Why doesn't Sun-woo's mother go to work?

Sun-woo's mother doesn't go to work because Sun-woo opposes her work, and Sun-woo's mother has a wrist injury. According to relevant public information, Sun-woo's father died long ago, and Sun-woo's mother has no job, so she raised two children with her husband's pension. Sun-woo's mother can't do heavy work because of her wrist injury and has never had a suitable job. In addition, Shanyu has always been particularly opposed to her mother going out to work to earn money. Shanyu once said that she would rather not go to college than let her mother go to work.