I remember a post saying that Guan Yu's martial arts was so high because he stole all the dates he sold, secretly hit other people's dates, and turned the pole for hitting dates very fast every day, so later he had extraordinary power, even thieves. Although it is a joke, it also shows Guan Yu's career.
In folklore, he had a son very early, which is the story of flowers. Guan Yu and Zhang Fei killed each other's families in order to completely revolutionize. As a result, Zhang Fei was reluctant to leave Guan Yu's pregnant wife, and later gave birth to Guan Yu's son. It was named Hua because it was taken in by Mr. Suo and Mr. Hua respectively. After I arrived in Jingzhou, I got to know each other and helped my father build great achievements.
Guan Yu's sons all appeared later in the romance. The first is his adopted son Guan Ping. After arriving in Jingzhou, she gave birth to Guan Xing, Guan Suo and a daughter.
In the official history, Guan Ping is Guan Suo, the eldest son of Guan Yu. Guan Yu's second son Guan Xing inherited the title of Guan Jia.