He wants all his sons to marry Zhen Fu. It can be seen from this that there is a special aspect of Zhen Fu that Cao Cao attaches great importance to. What Cao Cao thinks about Zhen Fu is not clearly recorded in history.
But Cao Pi married Zhen Fu mainly because the Zhen Shiyin family was an influential family in the history at that time. Zhen Shi's ancestors used to be the Central Pacific Insurance, his father was a fief sovereign, and Zhen Fu's two brothers were admitted to the state officials and were also the wives of Yuan Shao's son. After Cao Cao entered Hebei, he carefully inspected some local forces. So he wanted to win over some high-ranking officials and dignitaries. After Zhen Fu remarried, it also represented the Zhen Shi family's support for the new ruler Cao Cao. There is no doubt about it. In short, women are the families of men who participate in politics.
Without a special family background, it is difficult to have a lofty status. Ordinary wives are nothing more than men's property, and it is normal for property to change hands. As a woman with a family background like Zhen Shi, she represents a family power, so she is also prominent in Cao Pi's harem. Princess Quan, Liu Bei's martial arts, Sun Jian's wife and future martial arts are all typical examples of this kind. So, this is a political marriage.