After the battle, Zhang Xiu asked Jia Xu: "When I led my best troops to attack Cao Cao while he was retreating, you predicted I would lose. When I led my troops to attack Cao Cao again just after he defeated me, you predicted I would win. Your predictions turned out to be accurate. But why is it that your predictions seem so counter-intuitive?" Jia Xu replied, "It's easy to understand. General, you may be skilled in warfare, but you're still no match for Cao Cao. When Cao Cao withdrew his forces, I knew he would personally lead his rearguard to cover his retreat. Even though your troops are well-trained, Cao Cao is better than you as a military leader, and his troops are as equally well-trained as yours. Therefore, I knew you would lose. When Cao Cao first attacked you and decided to retreat halfway even though he didn't make any mistakes, I believed something must have happened in his base. After he defeated your pursuing forces, he would lower his guard and hastily retreat. His officers will then take command of the rearguard. They may be brave, but they are no match for you. Therefore, I knew you would win them even though you're leading a group of soldiers who have just been defeated." Zhang Xiu was very impressed with Jia Xu's analysis.