According to unreliable unofficial records: Sima Yi, who used to be a spy, disguised himself as a woman and took the pseudonym Huang Yueying in order to lurk beside Liu Bei and Zhuge Liang. Later, Zhuge Liang found out, but Zhuge Liang found that he was hopelessly in love with Sima Yi. In order to prevent the information from being passed on, Zhuge Liang had no choice but to force his son to marry Sima Yi, who was Huang Yueying. This was also the reason why he had no heirs in his early years.
