The love line between Ming Lan and Qi Heng in " Know, Know, Should Be Green, Fat, Red, and Thin " reflected the pursuit and importance of marriage, love, and social status in ancient feudal society. In the novel, Ming Lan and Qi Heng's love line was described very delicately and touching, but their love road was not smooth, and they experienced many twists and turns and tests. This reflected the seriousness and stability of marriage in ancient feudal society, especially in a male-dominated society where men usually played the role of the leader of the family and society. They needed to use various means to ensure the stability of their marriage and status. The relationship between Ming Lan and Qi Heng also reflected the value of love in ancient feudal society. In the novel, Ming Lan and Qi Heng are very involved in each other's feelings, but their love path is not smooth. They need to face many practical problems and tests. This reflected the cautiousness and conservativeness of people in ancient feudal society towards love, as well as their pursuit of social status and stability. The love line between Ming Lan and Qi Heng was a very representative plot in " Knowing, Should Be Green, Fat, Red, Skinny ". It reflected the pursuit and importance of marriage, love, and social status in ancient feudal society. At the same time, it also reflected people's cherish of love and love.