In the earlier stage of Liu Song Dynasty , there were two pairs of principal contradictions, namely the contradiction between imperial kinsmen and ministers of different surnames, and that between imperial kinsmen and great clans.

At the beginning of the Wei Dynasty,with the declining of social education,the formation of the door valve gentry,nine-rank system was established with the compromise of the court and the well-known family.

From the perspective of historiography,the main reason for "Cui Hao State History Case" is that Cui Hao wanted to adjust the positions of Han officials in the government of Tuoba ethnicity by chance of revising state history,which brought his assault by Touba high-level leadership.

Shizu Political Archives—Genealogy;