Beyond Daokou Gully lies Changhe Prefecture.
Between Changhe Prefecture and Long'an Prefecture, there are four county towns. Mu County, Cunning County, Gaoshui County, and Shuohe County, these four county towns were previously occupied by the Rong people.
Tie He, while passing through these counties, ordered his troops to retreat together.
If they didn't retreat, when the tens of thousands of soldiers led by Xu You came to kill, the thousand Rong soldiers left in the four county towns would be utterly defeated.
This was convenient for Xu You, who regained the four county towns without a fight.
