 When Sima Yi and his troops were stationed to the south of the Wei River, Guo Huai urged them to move to the plains on the north bank of the river as he foresaw that Zhuge Liang would attempt to seize the plains.When the other officers disagreed, Guo Huai said, "If Zhuge Liang crosses the Wei River and occupies those plains, his troops will have access to the mountains in the north.If they block the road through the mountains, it will cause fear and panic among the people living in the region.