C376 A Treasure of the Meritorious System
In the empire, below the emperor, there were three levels of nobility. For example, the Jiang family of the Blue Bay star field, was a family with a third-tier nobility, and above them was a 2nd tier and a 1st tier noble.
According to the imperial edict, a noble title was not allowed unless one had military merits. If one became a duke of the empire