Li Guodong personally led his men to arrange the blasting room under the stable and the forage pile. The iron picket soldier dug a two-foot deep pit underground in the blasting room, laying a layer of wooden boards at the bottom of the pit, and then put two thousand kilograms of gunpowder bags on the wooden boards. The two thousand kilograms of gunpowder bags, with the weight of the outer packaging, was buried here for more than one thousand kilograms of gunpowder.

Then, the iron pickaxe soldiers laid a layer of wooden boards on the gunpowder bag, leaving only a small hole, connecting the fuse inside. The fuse was pulled out and penetrated into a bamboo tube to connect it to the outside. Above the wooden board, more than two hundred ignition oil tanks were neatly placed, but these ignition oil tanks were all iron cans. A pillar was nailed on the top of the wooden board, and an iron plate was laid on the top.

The function of this iron plate is to break through the soil layer on the ground in the moment of explosion, so that the ignited ignition oil tank below can fly out of the ground in a relatively complete manner and ignite the stables and forage piles above.

"One thousand five hundred kilograms of gunpowder and more than two thousand kilograms of hot tincture oil are enough for Jiannu to drink a pot!" Li Guodong said with a smile.

According to the requirements, the iron pickaxe soldiers built a brick wall outside the blasting room. The bamboo tubes penetrated the fuse extended out of the holes reserved by the brick wall. The brick wall sealed the blasting room tightly to ensure that a large amount of high-temperature and high-pressure air generated when the gunpowder exploded can only be transmitted upwards, so that a large pit could be blown up on the ground, and the ignited ignition oil tank was thrown out and burned everywhere.

Li Guodong led his men into another fork and came to the blasting room below the Qing army's central camp. The layout here is relatively simple, with five strong wooden boxes placed inside. Li Guodong asked someone to pour 2,000 kilograms of gunpowder into the large wooden box and connect the fuse. The fuse also passed through the bamboo tube and connected to the outside. The outside of the blasting room was blocked with brick walls. After the explosion occurred in the underground blasting room here, the Qing army located directly above the blasting room must have been crushed. According to Li Guodong's judgment, it is estimated that Dorgon's central camp could be affected. However, whether Dorgon can be killed depends on luck. It is probably not a big problem to hurt him.

Each of these two blasting rooms has at least two brick walls closed. It is very strong. Once it explodes, it will be extremely powerful and enough to shake the entire Qing army camp.

After putting the gunpowder and setting up the blasting room, Li Guodong returned to the ground.

"Governor Lu, we can launch a counterattack tonight to attack the Jiannu camp! The underground things and the last generals have arranged them. Just wait for the explosion to catch fire, our army can enter the Jiannu camp." Li Guodong bowed to Lu Xiangsheng.

Lu Xiangsheng asked, "But today is the 22nd day of the twelfth lunar month, not the full moon night, I'm afraid the soldiers will not be able to see clearly."

"After the end, more than 2,000 kilograms of hot tincture will be buried in the underground blasting room. The explosion will catch fire and the flames can provide lighting. We can also carry a swarm of rockets to launch an attack, so there is no need to worry about whether we can see the target clearly."

"It's just a large-scale dispatch of troops at night, and I can't see the flag clearly when I get far away."

"The supervisor doesn't have to worry, we will act in batches. The last general leads one thousand cavalry. When the explosion starts, the last general will rush into the Jiannu camp. We still have four thousand cavalry, divided into four batches of operations. After the cavalry enters, the infantry will follow them into the Jiannu camp. At that time, the fire will ignite with the help of the fire, and our army's flag can be seen clearly."

Lu Xiangsheng stroked his beard and nodded. Suddenly he sighed to the sky as if he was remembering something: "It's just that hundreds of thousands of Ming people were imprisoned in the Jiannu camp. Our army attacked at night. I don't know how many people were going to lose their lives! What are the people? What are the people?"

Li Guodong said: "The last general knows what the people are doing, but now that things have come to this point, we cannot be merciless. If we just worry about hurting the people by chance and letting go of Jiannu who could have been killed, resulting in our brothers sacrificed for no reason, then in the future, more people will be massacred by Jiannu! In the battle tonight, the sacrificed people are for more people to survive in the future!"

Lu Xiangsheng sighed: "Guodong is right. Things have come to this point, so you must not be kind to a woman! Then act according to your plan and pass on the orders so that your brothers can prepare."

Li Guodong himself had 2,600 cavalry, Tianxiong Army and Xuan Army had 1,500 cavalry, with a total of more than 4,000 cavalry. He took advantage of the chaos to enter the Qing army camp. At that time, the explosion and fire broke out, and the Qing army that was in chaos might kill each other. At that time, more than 4,000 cavalry rushed into the Qing army camp, which was enough to kill the Qing army and defeat Dorgon in a miserable defeat. At that time, not only would the Tianxiong Army be saved, but Lu Xiangsheng be saved, but he could also make a great contribution. As for the annihilation of more than 70,000 Qing troops, it was impossible. Even if the Qing army was killed and dispersed, they would be able to quickly gather the defeated soldiers. Li Guodong knew that even if the Qing army was defeated and Dorgon gathered the defeated soldiers, he could easily repel Gao Qiqian's interception.

It was getting dark, and the Qing army outside the castle was still working on the construction overnight.

In the castle, Li Guodong took out the last little pork and fish. He had eaten the beef and mutton, but the pork and fish were just a little bit, and there was still a lot of horse meat stored.

Steamed bones and fish soup in a large iron pot, added enough ginger, green onions, and a little wine, which made it fragrant. The soup also added pepper, hawthorn and dried orange peel. The horse meat was soaked in cold water with orange peel, and changed the water every half an hour to remove the sour smell of horse meat. Then slice the horse meat and serve it on the table. When eating, put the sliced ​​horse meat into the pot and rinse it in chili oil. It tasted a bit like beef, and it didn't look like horse meat at all.

During the day today, the cavalry soldiers who were preparing for the night attack had already slept for the whole day. The dinner started at Wu hour, ate for more than an hour, and ended until the hour of Hai hour. Everyone let go of their stomachs and ate for a little rest after eating. Everyone checked their weapons and equipment.

Li Guodong walked into the stable, with tall horses tied into the stable. For more than ten days when he was besieged in Jiazhuang by the Qing army, Li Guodong and others still fed bean cakes, black beans, corn cakes and other grains to the war horses. The food and hay were added. The war horses were fat and strong, and they did not lose weight at all. But if they did not come out to attack tonight, the war horses would be almost gone. Although Wang Quan had stored enough food in Jiazhuang for half a year, the war horses could only be eaten for more than half a month.

"Prepare to set off!" Lu Xiangsheng distributed the token.

Li Guodong, Yang Guozhu and Hu Dawei walked in front, and more than 4,000 cavalry led their war horses and walked into the basement of the castle along the slopes inside the castle.

A door was opened and a hole appeared in front of it. The soldiers lit torches and walked into the tunnel. The tunnel was not short, about one mile long, and the exit of the tunnel was more than 300 steps away from the outside of Jiazhuang.

This is the middle of the year. According to the agreement, the iron pickaxe soldiers who stayed in the city will ignite the fire at the middle of the year.

The reason why it was replaced by a night attack at one minute in the middle of the hour of the lunar month rather than the early morning attack between the Yin and Mao periods in the past was that Li Guodong also told Lu Xiangsheng that the troops of the enemy and us were very different, and only the darkness could maintain the long-term chaos of the Qing army. If the attack in the early morning, it would be dawn soon and the Ming army would be unable to wipe out the Qing army completely, and the Qing army would soon be able to gather the defeated troops. Wouldn't the night attack be in vain?

At night, the Qing army was still attacking. Baoyi Aha, who was in charge of the night shift, held a torch and escorted the captured Han people who were captured on the night shift, and pushed a cart of sandbags to fill the houses outside the castle. A bunch of bonfires were lit in Jiazhuang, and the captured Han people picked up sandbags and threw them on the ground. The sandbags gradually increased. The Ming army counterattacked from time to time, shooting over countless newly-packed Han people. Some of the more unlucky Baoyi Aha's shield could not be blocked and was shot by the projectile arrows.
Chapter completed!