Cao Ergou took two agile soldiers, ready to climb to the high place of the mountain next to the mountain road and chose a place with a wide field of vision to lurk, but this mountain is extremely steep and took a long time to climb a narrow platform about one zhang from the ground, fortunately, this platform is small but can accommodate three people, there are small trees to block but do not affect the vision. Half an hour later, the Mongol striker appeared in the field of vision of the three of them. When more than a dozen Mongolian soldiers had just turned the corner and walked to the open field, they were unsurprisingly warmly received by the mountain bandits. However, the arrow shot was partial and weak, and did not hurt the Mongol soldiers, but slightly injured a war horse. The Mongolian rangers are the elite of the army, and the Mongolian soldiers who play the vanguard are the elite of the elite, they do not panic when they see the incoming arrows, but calmly hide behind the horse and hold a leather shield to defend, and after stabilizing the formation, the Mongolian soldiers of the brigade appear from the turn one after another to the open place, and stand a large number of black crows. Cao Ergou roughly estimated the number of Mongolian soldiers, which was a team of 100 people. Just when the Mongolian soldiers were tidying up the formation, the watchtower no longer released arrows, and it turned out that several mountain bandits on the tower had jumped down from the tower when they saw that the situation was not good, and they were fleeing to Wanshanzhai. In a short time, several forts along the way up the mountain trail began to sound with the sound of rapid gongs.

The Mongol hundred-man team stopped in an open place in a defensive formation. Two teams of 10 men followed the two roads at the T-junction to investigate, while the rest of the men waited in formation. When the ten-member Mongolian army marching in the direction of the mountain was about to reach the hiding place of Cao Ergou and others, there was a chaotic roar from the assembly place of the Mongolian army, and the Mongolian soldiers of the ten-man team quickly turned around. Immediately, Cao Ergou saw the 100 members of the Mongolian army, so he lined up in an attack team and headed towards Wanjiazhai. Cao Ergou and the others held their breath and did not dare to reveal their hiding place at all, because the Mongolian army also left a ten-man team to guard the horses in the same place. The ten-man team stood on guard with bows and bows under the cover of horses. With the skill of the Mongol soldiers, there was no possibility of escape for those within their range, and Cao Ergou and the three of them would be wiped out if they were discovered.

In addition to abandoning the watchtower next to the T-junction, the bandits put up a resolute resistance at several watchtowers along the way to the cottage. The mountain bandits suffered a great loss in the bow and arrow shooting, and although they shot condescendingly, their accuracy and strength were much inferior to those of the Mongols. Although the mountain bandits were equipped with strong crossbows, they were not many in number, and most of them were still self-made compound bows, which were inferior in quality to the Song army's military bows. The mountain bandits' inferior bows and soft arrows did little damage to the Mongol soldiers who were protected by shields and leather armor, but they fell to the ground one after another under the strong bows of the Mongol soldiers. In less than half an hour, the Mongols, enraged by the broken horse skins and horse meat, attacked in front of Wanjiazhai, and several wooden watchtowers along the way were set on fire, like an oversized torch. Most of the bandits guarding the watchtower were killed, and only a few fled back to the cottage.

The Mongols easily broke through several watchtowers along the way, but the closer they got to the gate, the more difficult it became, because of the steepness of the mountain and the danger of the terrain near the gate, and because the resistance of the bandits became more and more fierce. The mountain bandits were also well aware of the brutality of the Mongols, and knew that there was no possibility of survival after the village was broken. Therefore, when the Mongol soldiers attacked the gate of the cottage, they suffered a big loss in the desperate resistance of the mountain bandits, just like a wolf that bites its prey with a bloody mouth but bites a stone, and almost has its teeth broken. The Mongolian army attacked several times but had no way to take the tall wooden wall, so they had to shoot dozens of mountain bandits who showed their heads on the walled wall with hard bows and arrows, but they themselves suffered heavy casualties, and they had to slowly retreat in desperation after an hour. After assembling at the open area of the T-junction, the Mongolian army wrapped the dead, and the wounded helped up their horses, and slowly marched out of the mountain in the shape of an army.

The two or three hours of lurking made Cao Ergou and the three of them numb in their legs and feet, but they also had a rough look at the battle situation. In Cao Ergou's view, one of the reasons for the great loss of the Mongolian army was that it was attacked from the back, and the Mongolian soldiers were already exhausted when they rushed to the front of the gate on foot; The second is that the path leading to Shanzhai Gate is narrow, and the Mongolian army cannot deploy its forces, so it can only attack one by one. Although the mountain bandits were suppressed by the strong bows of the Mongol army and did not dare to stand on the wall, the Mongols, who did not have siege weapons, still had no way to take the heavy fortress gate. There were fierce Mongolian soldiers who were not afraid of death and slammed the gate of the village with axes, but they were killed and burned by the big stones and burning wood thrown down by the wall; There were also Mongolian soldiers who climbed the wall with ropes with grappling hooks, and were also pouted by the spearheads sticking out of the wall; The Mongols tried to set fire to the walled gate, but the fire was extinguished by the bandits with water. Of course, Cao Ergou also saw the strength of the Mongolian army, when the Mongols retreated, he saw that the Mongolian army only had less than 20 casualties, and the mountain bandits were waiting for the danger of work, but the casualties were very heavy. Although Cao Ergou and others can only estimate the distance because of the distance, it is estimated that their casualties should exceed fifty. You must know that the mountain bandits are also quite disciplined in combat, and their combat power in defense is not inferior to that of the officers and soldiers. According to Li Shuang Yuzhu, Chongqing Prefecture and Yongkang County once sent 1,000 officers and soldiers to attack the mountain bandits, but they also returned in vain.

After the Mongols walked away, Cao Ergou and the others quietly walked out of the hiding place and trotted all the way to catch up with the team. After passing Wanjiaping, there were many trails along the road into the mountain, all of which led to the valleys on both sides, but because the team was traveling along the main road, Ouyang Xuan ordered people to leave many markers on the road, and Cao Ergou and the three of them would not go wrong. After about 20 miles of road, there was a fork in the road ahead, divided into two roads along the river straight and to the left, Cao Ergou and the three of them looked for the marks left on the road and turned onto the left mountain road, and walked along the valley stream for 20 miles before catching up with the team that was resting, and it was almost dusk at this time. Cao Ergou walked quickly to Ouyang Xuan and said: "Brother Xuan, oh, my lord, the Tartar soldiers failed to attack the mountain bandits, there were casualties on both sides, and the Tartar soldiers have retreated to the outside of the mountain......." At this time, Ouyang Xuan was discussing something with several fire chiefs, and when he saw Cao Ergou and the three of them returning safely, he stretched his frowns slightly and said: "It's good that you came back safely, and the specific situation will be explained in detail later." In the future, you can call me Brother Xuan, don't call me a team member, listen to it! "Two brothers, go and rest, Second Brother Cao is here to discuss matters," Ouyang Xuan continued.

Cao Ergou walked into the conversation where Ouyang Xuan and the fire chief were sitting around, found a stone and sat down, and after listening for a while, he knew what was making Ouyang Xuan and several fire chiefs embarrassed.