There are many benefits to this approach. Firstly, it ensures the selection of the best possible candidate for the throne to the greatest extent, and secondly, it appeases other members of the royal family. As long as your descendants show promise, who's to say they won't be able to pass the four great challenges and become the emperor of the Great Yan Dynasty?
As a result, it is unlikely that any of the princes who have been ennobled would betray Great Yan.
After all, the throne is passed down within the Great Yan Imperial Family.
This is much better than in Great Zhou, where it avoids many bloody incidents.
At the same time, Cheng Guang also understood that each kingdom is different.
Located in a remote area, the Great Yan Dynasty doesn't have many resources. Apart from being able to manufacture weapons and armor, there isn't much else to boast about. Survival depends on the goods from other dynasties.
