Guo Yue lit the medicine line beside him, and set fire to one gunpowder pot after another along the medicine line, and in an instant, the entire defense line was closed, and the night sky was illuminated white.

The soldiers of the Yan army had already poured buckets of fire oil on the walls and floor tiles, and piled up oil-soaked firewood and grass in inconspicuous places, which caused the fire to spread rapidly and swallowed the middle section of the defense line in a short time.

Seeing the sudden fire that burned Qin soldiers one by one did not dare to move forward, Xiahou Zhang said: "I didn't expect Guo Yue to really have a hand, but it seems that he wants to burn all the jade."

"Do you want to stop us with a little fire, Guo Yue is simply too naïve."

After Li Xin finished speaking, Hao Zhan brandished his long sword and shouted to the soldiers: "What are you cowardly, rush up for me, don't blame me for being ruthless if you rush slowly."

The Qin soldiers didn't dare to hesitate any longer when they heard this, they all shouted and rushed forward, and the guard mark on the defense tower on the side immediately pulled the oil cylinder hanging at the front end of the tower, and the turbid fire oil poured down.

Immediately after that, Wei Biao drew his bow and led an arrow, and a rocket shot it ignited a puddle of fire oil on the floor tiles, and a flame instantly pierced the clouds, and the rolling fire dragon spit fire mist unscrupulously.

Many of the Qin soldiers became overwhelmed by the fire, and then they were soon swallowed by the fire dragon, and the Qin soldiers struggled to flee from the place one by one, but were soon killed by the nearby Yan soldiers.

Wei Biao walked down the defense tower, and with the help of the cover of the fire, he and Wang Jing and Ma Xing led the whole army to withdraw from the pass, and the whole army of the Yan army came to the shore of Yishui, boarded several warships that had been prepared, and headed towards the east bank.

Seeing that the fire was getting bigger and bigger, Li Xin shouted loudly: "Soldiers, let's withdraw for a while, and then fight with the Yan army when the fire is smaller."

"It's all here, why are you in a hurry."

With that, Guo Yue opened two water-soaked grass piles, and pushed out the four heavy ballista carts with two soldiers, and then Guo Yue took a torch and lit the crossbow arrows on the heavy crossbow.

These crossbows were all repurposed, and although each heavy crossbow was equipped with only one, the power was amazing, the middle of the blade was as thick as a wrist, and it was filled with gunpowder, oil, and many fine pieces of iron, and the arrows were equipped with five or six arrows with special devices in addition to the arrows. (The principle is similar to that of modern missiles, don't ask Guo Yue, an ancient person, how he thought of it, make up for it by himself)

After all four crossbow arrows were ignited, Guo Yue and two Yan soldiers overtook the heavy crossbow and shot the crossbow arrows, and the crossbow arrows quickly penetrated into the crowd of the Qin army, due to the burning of gunpowder and oil in the arrows, the crossbow arrows burst in the Qin army's array, and one by one the iron pieces flew out, causing heavy casualties to the Qin army.

After the explosion, the Qin army was chaotic like a plate of scattered sand, and before the formation was set up to resist, the four crossbow arrows flew out one after another, and more than ten soldiers in the front row of the Qin army were killed and the arrows fell to the ground, Hao Zhan was also in the army, fortunately, he didn't stand very forward, so he only suffered an iron piece.

A burst of gunpowder smoke dissipated, Hao Zhan led his troops to check, but Guo Yue's figure had long since disappeared, leaving only the four heavy ballista carts without crossbow arrows to stay in place.

Before Wang Jing left, he was afraid that Guo Yue alone would not be able to resist, so he left a hundred soldiers to fight with Guo Yue in the pass, these hundred soldiers rushed into the Qin army and slashed everywhere, and after a while, Guan Fei's men and horses were surrounded, Guan Fei's soldiers and soldiers were completely fearless, but because of the spread of the fire, all his men fled, and no one cared about Guan Fei and no one paid attention to the Yan army that was killed.

Seeing this, Su Fei hurriedly rushed to help Zhan Jin halberd and wiped out the Yan army that surrounded him, and Li Xin also led the army from the new killing, and soon annihilated the remnants of the Yan army in Guan.

After a while, the fire was closed, and the fire was controlled, Xiahou Zhang, Zang Chao boarded a lookout that was not broken, and the two looked east together, only to see a small boat was speeding towards the opposite shore, and there was a person standing on the boat, holding a weapon, carrying the banner of the Yan Army, and it was Guo Yue.

All the generals of the Qin army stood in the high area of the pass and looked over, watching Guo Yue's back getting farther and farther away, Xiahou Zhang said: "In this way, in order to prevent Guo Yue from having further plans, we should ask the general to cross the river and pursue again."

"I also need to ask for instructions, Guo Yue's fire caused heavy casualties to our army, and this revenge will not be avenged."

After Li Xin finished speaking, Hao Zhan said to this kind of person: "General Li is right, our army still has thousands of people at Guanxia Pass, and they will cross the river together to avenge the dead soldiers, I don't believe that Li Xin also ambushed soldiers and horses in the river and prepared to set fire."

Hearing that Hao Zhan was in line with his own thoughts, Li Xin nodded and did not listen to other suggestions, and immediately ordered the whole army to find ships and prepare to cross the river.

The Qin army did not take much effort to find three large warships, and Li messenger sent 2,000 soldiers and horses to board the warships and chase eastward.

These three warships were actually deliberately left behind by Guo Yue, and the bottom of the ship had already been chiseled through several holes, but all of these holes were deliberately covered, and a few pieces of wood were also placed in the cabin, one to block the holes to prevent being detected, and the other to increase buoyancy to prevent the warship from sinking before anyone else came, because of this, the warship floated safely and stayed on the water, and Qin Jun did not notice anything abnormal after boarding the ship.

After the Qin army boarded the warship, the water suddenly poured in, and soon the three warships sank into the water one after another, and the two thousand Qin soldiers who had just boarded the ship drowned countless people, and only a few struggled to escape back to the shore.

Hao Zhan waved his long sword twice and gritted his teeth and said: "Guo Yue deceived me too much, if I don't kill this person, it will be difficult to eliminate the hatred in my heart."

Then Hao Zhan boarded a small boat and drove it himself, and Xiahou Zhang, fearing that Hao Zhan would lose, hurriedly ordered all the soldiers to cross the river to pursue the Yan army.

At this time, Li Xin and Guan Fei had already arrived with more than 100 small boats, and when they arrived at the shore, Li Xin immediately issued an order for the whole army to cross the river.

Hearing the news that Li Xinxia, Hou Zhang and others led an army to cross the river to pursue the Yan army, Wang Jian hurriedly asked Qian Fei to go with his token to stop it, and when he arrived at the riverside, a Qin soldier and Qin general had already disappeared.

Qian Fei stood on the shore and looked east, and saw more than 100 small boats carrying the Qin soldiers in the river, and in desperation, Qian Fei had no choice but to stay on the shore and wait for them to come back or the army to arrive.

Li Xin and other generals led the army to just halfway through, and many Yan soldiers who had already been ambushed emerged from the water, and they threw spears at the Qin army, and dozens of people in the Qin army were shot and fell into the water, and these Yan soldiers swam away after throwing the spears they carried.

Hao Zhan completely ignored everything that happened around him, controlled the sculls with one hand and raised his sword with the other to sweep away the flying spears, and after a while, he approached the boat where Guo Yue was......