The former Emperor of Yan Nation, Pu Song, was a talent. He wasn't particularly extraordinary, but he at least had some abilities.
He was able to quickly grasp the crux of matters in cooperation with the Sand Dog Nation, forming a fraternal alliance with them in the first year, and in the second year, he proposed a merger, which indicated that the person making such decisions was definitely not simple.
After the merger, Pu Song devoted a lot of energy to make the capital officials and local officials of the original Yan Nation willing to follow the leadership of the East Country Council, rather than creating obstacles.
Even with various forms of assistance provided by the Sand Dog Temple system, there were still many who created obstacles.
The policies from above would still be ignored by some below, and local officials not only disobeyed orders but also caused trouble.