Li Shimin led the Xuanjia Army to march eastward for about thirty miles, and was out of the reconnaissance range of the Sui army's scouts, so he decided to circle south and return to the main camp.
Li Shimin never thought of a sneak attack at the mouth of the river.
In Li Shimin¡¯s view, since the mouth of the Huihe River is an important place for the Sui army to transfer military supplies, it must