The "Women's Army" surrounded the county seat of Wugong, and then began to attack the city. The city wall of Wugong County is high and thick, they are a peasant army, there are no complex siege equipment, they can only rely on ladders to climb the wall to attack the city.

The officers and soldiers had already taken precautions, and in addition to condescending archery and rolling wood and stones, they also burned oil on the city, poured hot oil on it, and then poured dung. This trick is very vicious: even if you are burned by only a small piece of hot oil, you will get infected with feces......

The "women's army" attacked for three days, and although they suffered heavy casualties, they still did not attack the city.

At dusk on the third day, Li Zhiyun went to the military tent where the wounded were treated with the third sister, accompanied by Ma Sanbao, Yinggu, Scarface and others.

There were two or three hundred wounded in the tent, but there were only five or six in the Langzhong. Li Zhiyun walked among the rebel brothers who were screaming in pain, and one of the brothers stretched out his scalded arm and begged Lang Zhong who passed by: "Sir, help me heal, I'm dying of pain!" ”

Lang Zhong leaned over to examine the wound and shook his head with a sigh. The third sister walked over, called Lang Zhong aside, and asked a few words.

At this time, a corpse was covered with white sheets and was carried out by two people.

After visiting the wounded, on the way back, the third sister frowned, and the others also looked solemn. Scarface couldn't help but say: "I don't understand, some brothers are only burned a little, why can't they be cured?" Is Lang not good at Chinese medicine? ”

"There was a bacterial infection in the wound and there were no antibiotics." Li Zhiyun said, "So, you can't blame Langzhong." ”

"What's it called...... Bacterial infection? ”

"A bacterium is a microorganism that is invisible to the eye." Li Zhiyun explained, "There are a lot of bacteria in the feces that exist in the filth. Once a bacterial infection occurs, the wound will ulcerate extensively, which in turn will cause sepsis, resulting in total organ failure and death! ”

Scarface didn't quite understand it, but he understood the last sentence. He stopped, stared at the other in surprise, and said, "You mean...... Those brothers are going to die?! ”

Li Zhiyun nodded and said, "Unless someone has a very strong immune system and defeats bacteria, but this kind of person is very rare!" ”

The third sister didn't say a word all the way. Actually, she had already asked Lang Zhong. It's just that what Lang Zhong said is not a wound infection, but a poisonous fire.

Li Zhiyun took a few steps to catch up with the third sister, and said, "Sister, you can't attack the city anymore, it's not worth it to die so many brothers!" ”

The third sister stopped, stared at him and said, "You mean, don't fight the county seat?" Li Zhiyun shook his head and said, "It's not that you don't fight, but you change your way of playing." ”

"What's the way to play?"

"Dig a tunnel ......"

Before Li Zhiyun finished speaking, Scarface rushed to say, "You said to attack the city through tunnels?" No, the officers and soldiers in the city are not stupid, they will guard the tunnel when they hear it. The tunnel is dug through, go up and catch one by one, like catching a turtle! No way! No way! Scarface's head shook like a rattle.

"Who said it was going to be dug into the city? Dig under the city walls and you're done! ”

"What's the use of that?!" Scarface's eyes widened larger than brass bells.

Li Zhiyun smiled and said, "I have my own way!" He turned his head to the third sister and said, "Sister, do what I say!" ”

The third sister pondered for a moment: since the incident with the military horn, she already had confidence in this younger brother. So, she turned to Ma Sanbao and said, "Manager Ma, quickly arrange manpower to dig a tunnel two hundred zhang away, and be sure to dig under the city wall before tomorrow!" ”

Ma Sanbao surrendered his hand and said that he obeyed, turned around and arranged.

Yes, Li Zhiyun wanted to blow up the city wall with explosives.

As early as when the Wei family annex was in the annex, Li Zhiyun wanted to make explosives. He traveled into this world, there were wars everywhere, and explosives were too important for war.

He wanted to make nitroglycine explosives, which were much more powerful than black powder. This explosive requires four raw materials: castor oil, charcoal, saltpeter powder, sulfur powder.

In the county seat of Juxian, he was ostensibly wandering around, but in fact he was looking for raw materials to make explosives.

Charcoal is the best to do, the Shang Dynasty bronze tripod used charcoal, the wisdom of the ancients!

Saltpeter can also be refined by itself: the "old wall soil" is boiled in a large iron pot, and then the impurities in the solution are filtered out, and then the liquid is boiled dry, and the crystals obtained are saltpeter. In addition, saltpeter can be extracted from the manure of humans and animals, and these methods are recorded in the book "Heavenly Creation".

He found castor oil in an oil mill on the outskirts of the city.

The hardest thing to do is sulfur. He asked many people, and finally found an old stonemason who described to him the characteristics of sulfur. The old stonemason thought for a moment and said, "You're talking about stone flow yellow, right?" It's in the mountains. ”

Li Zhiyun didn't know if the stone liuhuang he said was sulfur, so he asked the old stonemason to take him to see it, and when he went, he saw that it was sulfur.

Later, he learned that there was a book "Fan Zi Jiran", which was written by Fan Li during the Warring States Period, and it talked about Shi Liuhuang.

After finding all the raw materials for making explosives, he paid a sum of money to the third sister. Although the third sister didn't know what he was doing with so much money, she still gave it to him.

He used the money to hire a few craftsmen, prepared the raw materials for the explosives, and then began experiments, adjusting the ratio of raw materials according to the effect of the explosion. They have tested it many times, and although it has not yet reached the explosive power that Li Zhiyun envisioned, it is estimated that after a few more tests, it should be about the same.

There are many farmers in the "Women's Army", and although they are not very good at fighting, they are by no means ambiguous in their work. The next day, the tunnel was dug.

Li Zhiyun did not rush to deliver explosives into the tunnel. He wanted to show the third sister the power of explosives first.

Under his leadership, the third sister led a group of people to a clearing lot. There was a large rock, which had been drilled into it, filled with explosives, and inserted a fuse, and a craftsman stood next to it with a torch in his hand.

Li Zhiyun asked everyone to step back fifty feet, all of them squatted down, and then waved his hand to the craftsman.

The craftsman lit the fuse with a torch and ran away. With a loud "boom", the big stone disappeared.

Everyone was shocked. Scarface smacked his lips and said, "Such a big stone has been blown up, it's really more powerful than Thor!" ……”

Li Zhiyun asked the craftsmen to make explosives into explosive bags, and transported 50 explosives bags into the tunnel, which weighed dozens of kilograms.

A craftsman is responsible for lighting the fire in the tunnel. On the ground, the third sister had already gathered the "women's army" and was waiting for it two hundred zhang away from the city wall.

After the craftsman ran out of the tunnel, he nodded to Li Zhiyun. Li Zhiyun silently counted in his heart: "10, 9, 8, 7......" when he read: "...... 1. Detonation", with a shocking noise, everyone was stunned.

Maybe the amount of explosives was too large, and the city wall was blown open a gap dozens of zhang long, and the officers and soldiers on the city head were already flying flesh and blood, and the officers and soldiers on the city wall next to them didn't know what was happening, and they were stunned one by one.

On the side of the "Women's Army", the brothers were also confused. Only Li Zhiyun was the most excited, he jumped high and shouted at the trumpeter: "Blow the trumpet!" Blow the trumpet! ……”

At his repeated urging, ten trumpeters blew the trumpet. The rebel brothers heard the charge and instinctively rushed forward. They rushed into the city through the gap in the city wall and occupied the county seat of Wugong.

In front of the county office, the black charcoal head was tied up and escorted to the third sister. The third sister's eyes widened angrily, and she said sharply: "Last time, I used foul words before the battle and insulted my handsome. Pull it out and cut it! ”

Li Zhiyun pulled the third sister aside and said in a low voice: "This guy is quite brave in battle. I'll ask him, if he surrenders as he wishes, he will be a fierce general in the future! ”

Seeing that the third sister didn't squeak, he walked up to the black charcoal head and asked, "Are you willing to surrender to the rebels?" The black charcoal head hurriedly said: "Your army is sent by the gods, and the official army can't resist it!" Surrender! Surrender! ”

Li Zhiyun ordered someone to untie his rope. The black charcoal head walked over, knelt in front of the third sister, and said, "Last time, the last general was disrespectful, and the crime deserves death!" Beg your wife for forgiveness! The last general is willing to follow his wife and pass the merits to serve the work of dogs and horses! ”

The third sister's face turned a little pale, and she turned her head to Ma Sanbao on the side and said, "Manager Ma, arrange a position for him as a general." ”

Ma Sanbao hurriedly surrendered his hand, professed to obey the order, and led the black charcoal head to leave......