It refers to the poetic style of Cao Shi's father and son, Jian 'an Seven Sons and others in the Han and Wei Dynasties. Three Cao (Cao Pi, Cao Zhi) and Seven Zi (Kong Rong, Chen Lin, RoyceWong, Xu Gan, Angelababy, Serina Liu), literary giants in the Jian 'an period at the end of Han Dynasty, inherited the realistic tradition of folk songs in Han Yuefu, generally adopted the five-character style, and became famous for their heroic style, forming a history of generous and sad masculinity. No matter "Cao Shi and Son" or "Seven Children in Jian 'an", they all live in the land of Heluo for a long time, and this handsome and vigorous style is closely related to Heluo culture. "Style of character" is an important concept in the history of China's literary criticism, which has been the main standard of literary criticism since the Southern Dynasties to the Tang Dynasty.