Why do you want to transfer the "eight-character army" to the Yellow River?

"Jurchen military leaders in Hebei regard Wang Yan's department as their main rival. Although he attacked his camp with private soldiers many times, he lost more than he won. They sometimes want to cross Henan again, but they are always afraid to put this wish into action because of the constraints of Wang Yan's troops.

Later, Zong Ze invited Wang Yanxin to Kaifeng to discuss with him. It was extremely important to disturb the enemy's confidant in Hebei, but it was more important to strengthen the security of Kaifeng, so that Emperor Zhao Gou dared to return to Kaifeng. He hoped that Wang Yan could transfer the expanding "eight-character army" to the south bank of the Yellow River to enhance the defensive momentum there. According to the opinion, Wang Yan led all the forces of the Eight-character Army, as well as some loyal militia leaders such as Jiao, to cross the Yellow River in the south and deploy troops along the Yellow River, completely under the command of staying in Tokyo. Zong Ze reported this to Emperor Zhao Gou and recommended Wang Yan as the special envoy of Hedong and Hebei.