Big sister. According to the query, Tencent Video official website shows. In the fifth episode of the TV series "Big Sister", the protagonist Ya Juan was badly in need of 20,000 yuan because her sister was terminally ill, so she went to borrow money from gangsters and was unfortunately trapped. Big Sister is a Chinese mainland TV series, directed by Zhang Jinbiao and starring Chen Xiaoyi, Liu Jun, Li Ge and Chang Hao, which was released in 2008. The play mainly tells the story of a girl named Dajie who takes care of her four siblings after her parents died.