After making a plan, Song Qing went to mobilize the people of Pingyang Pass to evacuate according to Li Gengyun's arrangement. When the Northern Yuan Dynasty captured the imperial city, many people had fled south, and there were not many people left in Pingyang Pass, so the people in the city quickly mobilized and evacuated Pingyang Pass after receiving the notice.

On the other side, He Jin led a hundred soldiers and began to collect croton and croton's branches and roots from house to house, and after more than an hour, all the crotons and croton branches and roots in the city had been concentrated in He Jin's hands.

Li Gengyun took 500 soldiers to the Valley of the Teeth to prepare for an ambush, 400 soldiers were arranged to collect firewood, and the other 100 soldiers went to mine boulders, and concentrated a large number of rocks at the entrance of the valley and on the top of the mountain at the end of the valley to block the valley.

After the people of the whole city had evacuated Pingyang Pass, Song Qing and He Jin each led their own teams, two hundred people were responsible for blocking the flowing water in the west, and the other three hundred people were to mash the croton and its branches, leaves, rhizomes, and scatter them into the blue and white pool.

When everything was ready, it was already the morning of the next day, Li Gengyun pinched the time, and in half a day, Qian Yuan's cavalry team would enter the Valley of the Teeth, and the soldiers around him caught a lot of birds and beasts, quietly waiting for the arrival of the Yuan army.

At noon, Li Gengyun felt a slight vibration from the rocks in the valley, and he thought about the east road and looked over, and vaguely saw the billowing smoke and dust coming in the direction of the valley between the teeth, getting closer and closer.

"It's coming!"

At this time, Li Gengyun sent a message to all the soldiers to get ready, and at the same time he clenched his fists tightly, and his palms were a little sweaty, after all, this was his first time on the battlefield, although it was only an ambush battle, he was still a little nervous.

As Li Gengyun expected, after Hu Dahai fled back, he directly reported to Qian Yuan the information of Li Gengyun in Pingyang Pass, and also told the two hundred wolf knights who died in Pingyang Pass. However, he did not say that the 800 soldiers he led had surrendered to Li Gengyun, but only that there were more than 1,000 Song troops in Pingyang Pass.

Qian Yuan, who was anxious for quick success, immediately decided to attack with cavalry, and at the same time ordered his lieutenant to follow closely with three thousand wolf knights, and be sure to rush to Pingyang Pass before dark to capture Li Gengyun. All this is exactly what Li Gengyun calculated.

"Stop!"

Qian Yuan saw that there was the Valley of the Teeth in front of him, so he made a gesture of pause to the cavalry behind him, and the cavalry of more than 5,000 people ordered the prohibition and stopped a few hundred meters away from the Valley of the Teeth.

"The terrain here is a bit difficult to walk, this valley ......"

After all, Qian Yuan was still a veteran of the battlefield, and when he saw the terrain of the Valley of the Teeth, he was also a little uneasy in his heart, especially when he saw that the entrance of the Valley of the Teeth could only allow a cavalry to pass through, he was a little hesitant.

"General Qian! What's wrong? ”

"Hu Dahai, do you see any difference between this Valley of Teeth and when you came?"

Hu Dahai also followed Qian Yuan to hunt down Li Gengyun for the sake of merit this time, he endured his fatigue, looked at the entrance of the Valley between the teeth, and told Qian Yuan directly without thinking about it: "It's not unusual, it's the same as when I came before!" General, let's speed up, so as not to let Li Gengyun escape! ”

"Good! Into the valley! ”

Saying that, Qian Yuan took the lead and rushed into the Valley of the Teeth, and Hu Dahai behind him also followed into the Valley of the Teeth, and those cavalry followed closely behind, passing through the entrance of the valley one by one and entering the hinterland of the Valley of the Teeth.

"Release the birds!"

Qian Yuan was not fast when he entered the valley, he carefully observed the upper edge of the valley, and then many wild birds suddenly flew out above the valley, seeing this scene, Qian Yuan also nodded, and the uneasiness in his heart was finally put down, so he shouted to the cavalry behind him: "Speed up!" ”

The whole valley is nearly a mile away, after entering the valley, Qian Yuan walked in the first place, his weapon was the big axe that killed Zhuge Xuan was carried behind him, and the back of his neck was wrapped with a bloody bandage, this is the moment when Sima Ze gave him, after a few days of recuperation, the blood almost stopped, but occasionally when the wound was touched, there would still be blood stains flowing out. By the time Qian Yuan reached the end of the valley, the five thousand cavalry had already entered the valley.

"Do it!"

Li Gengyun shouted, and there was a gong sound on the top of the valley, and suddenly the entire Valley Between the Teeth heard this sound.

At the same time, boulders fell from the top of the two hills at the entrance and exit of the Valley of the Teeth, and the entrance and exit of the valley were quickly sealed.

"Oops! Hit the trick! Dismount and move stones! ”

When Qian Yuan saw the boulder falling, he quickly jumped off his horse, and then hid on the edge of the rock wall to avoid being hit by the boulder, while he issued an order to the cavalry behind him to dismount and prepare to move the stone.

"Humph! Will it be so easy for you to escape?! Li Gengyun saw that the entrance and exit of the valley had been sealed by boulders, and after snorting coldly, he shouted to the soldiers who were ambushed on the top of the hill on both sides of the belly of the valley, "Set fire!" ”

Not long after the boulder fell, Qian Yuan saw a lot of dry firewood falling from the top of the mountain, and at the same time, a lot of firewood that had been lit was also thrown down. Seeing this scene, he immediately affirmed that the other party was going to burn himself in the valley, so he shouted to the cavalry: "Come and move the boulder!" ”

The horsemen jumped from their horses, rushed to the entrance and exit of the valley, and began to move the stones. However, the space at the entrance and exit is narrow, only suitable for two people to work at the same time, and the weight of these boulders is not light, and it is a little difficult for two people to move, and they have not moved away very quickly, and a lot of firewood has been piled up in the entire valley, and at the same time, the fire has gradually begun to spread, and the fire and smoke began to swallow the cavalry in the valley.

It's not just these cavalry who are frightened, but the horses are even more irritable, the beasts themselves are afraid of fire, although the horses have been tamed, but in the face of such a fire, they are also irritable rampage, they scrambled to escape from the entrance, and the result was that the soldiers who were originally moving the boulders were trampled to death.

"Kill the horse!"

"Ahem! Kill the horse! ”

The fire is getting bigger and bigger, and the entire valley has been engulfed in fire and smoke, and Li Gengyun and they have already thrown all the firewood into the valley, and at the same time, they also evacuated the valley between the teeth at this time, and took a detour to the northeast along the mountain road, and the next thing is that Song Qing and He Jin are the two of them have to deal with it, and they have completed the first step.

"! Kill the horses! Move away from the boulders! ”

In the valley, Qian Yuan's scolding and the screams of the cavalry being burned by fire were constantly heard, and more was the neighing of the war horses, which resounded throughout the valley.