Song Bingxin suffers from congenital osteogenesis imperfecta. Therefore, bones are very fragile, so fractures often occur. With this disease, Song Bingxin's height also stopped at 96 cm. She became a porcelain doll, like porcelain, which is easily broken by a slight touch. Because Xiao Bingxin's mother is a porcelain doll. This is also the reason why Song Bingxin's parents knew well when she developed symptoms. But unlike her mother, her illness is not so serious. There are fewer fractures, so you can walk around with crutches and go to work in a nearby factory. Although the mother is disabled, there is a stubbornness in her bones. She will not use her physical disability as a cover to define herself as a weak person. Relying on a pair of mutilated bodies, she cuts clothes and feeds her family.