Because Pei Kun's ill, his family pays all money to heal him. His father has not any skill, so he can only do some part time work, and he needs to make money to pay for Pei Kun's medical fee. His mother needs to stay at home and take care of him. They don't have their own house, and they only rent a house near far from school.
Pei Kun is not healthy, he has congenital hearing disorders and congenital low weight.
Pei Kun's family feels it is hard to support his educational expenses.