Yue Fei said: "It is absolutely impossible to rely solely on the combat effectiveness of the army. The key to using troops is pre-war planning. The so-called' Luan's dragging firewood and defeating Jing, Mo Ao's picking firewood and twisting' is premeditated. "

Zhang Suo was surprised: "It's a waste of talent to put you among the ranks."

Yue Fei said: "Since the country is located in the capital of song dynasty, we must rely on the north of the Yellow River and firmly defend it. If our army can occupy the northern fortress and list the important towns guarded by the army, and one city is surrounded and other cities can help in time, the Jin people will not dare to have the illusion of going south again. In this case, the capital of song dynasty will be safe and stable. Zhang Zhao pleaded that if he could raise an army to cross the river to fight the enemy in the north, Yue Fei would do as he said. "

Zhang was overjoyed, but he also inspected the army, appointed Yue Fei as Wu, and ordered Yue Fei to cross the river north with Wang Yan.