When designing characters or plots, the novels of Ming and Qing dynasties are usually like making antithetical couplets, couplet by couplet, and organizing various narrative units relatively. Such a antithetical thought is intuitively embodied in the application of the following three different types of couplets: “couplet of the chapter subtitles”,“tail couplet of the chapter”,and “inserted couplet of the chapter”,which become an organic composition of the conceptions of the novels; yet in the design of characters and plots, it sometimes breaks away from the external form of the couplets, and organizes various narrative units relatively like making antithetical couplets.