He had people keeping a close eye on Guanshan City all along, so he certainly would have known if there had been any movement there. Combined with Li Feng's mention of Heaven helping him, the answer was practically obvious.
Li Feng had entered Hetao from Guanshan City, and then crossed from the Hetao region into their Xia territory. Taking advantage of the Xijiang River freezing over, he was indeed able to head south along the Xijiang River and strike directly at Jiujiang City.
Yet just thinking about such a route made him shudder with fear, and yet this very likely was the hard truth.
Chapter 185