Mi Rucheng refused to let Pang Wang marry Liu on the grounds of class concept. Pang Wang and Liu are two people with different identities in the TV series "The Granary in the World". Pang Wang is Mi Fei's servant, while Liu is a noble family. This class concept was deeply rooted in the society at that time, so they could not cross the class gap. In addition, Liu Cai is both talented and handsome. Pang Wang knew that he could not compare with Liu, so he dared not tell her.