The book is adapted from a moving story from the historical fiction Chronicles of the Eastern Zhou Kingdoms.The Orphan of Zhao takes place in the Spring and Autumn Period. The entire family of the meritorious official Zhao Shuo are framed and killed by powerful enemies. Cheng Ying and Gongsun Chujiu, two retainers of the Zhao family, made touching efforts and sacrifices to save an orphan of the family, who is brought up by the two retainers and ultimately avenges his family.The book is tragic and poignant, and sings praise of the integrity and chivalry of ancient gentlemen and knights.As early as Yuan dynasty, it was adapted into plays.The play was also introduced to foreign countries and popular in Europe.