At the time when Cao Cao and Yuan Shao were fighting in Cangting, Li Ying took advantage of the main force of the high cadres in Bingzhou, and immediately ordered Zhang Yan in Hetao area to lead 5000 troops to go south to Bingzhou, and ordered Ma Teng, who was stationed in Xihe County, to lead 5000 troops to attack Bingzhou from the west. He himself led 60000 elite troops, the main force in Guanzhong, to enter Bingzhou, and the three routes of troops went smoothly.
But at this time, Yuan Shao was defeated and retreated to Yecheng. Gao Gan led 10000 main forces to help Bingzhou. Li Ying pretended to order the army to encircle Taiyuan. In fact, he set an ambush on the only way for Gao Gan to go. He waited for Gao Gan to be taken in by him, but he didn't want to. Gao Gan was really cunning. He pretended to lead an aide general to draw 3000 soldiers to make a reputation