After dawn, Yang Yun stood at the head of the north of the city, first looked at the towering mountains in the northwest outside the city, and then looked at the low bungalow buildings in the city, and couldn't help but feel sad.

Coming to ancient times, at least give me a place with a high starting point, such as Chang'an, Luoyang or something, at least it should be Yizhou Prefecture to govern Chengdu and Yangzhou Prefecture to govern Jiangdu, now it is too difficult for me to climb up from such a low starting point, right?

"Little Zhenren, are you here?"

Just when Yang Yun was in a daze, Lieutenant Hu came to see him at the head of the city, "The thing you want has been found, but I don't know if it's sulfur...... Su County Order, let me show it to you. ”

County Lieutenant Hu asked the yacha to carry the yellow powdery stuff to Yang Yun in a bag.

Yang Yun looked at it carefully and nodded: "That's it, how many did you find?" ”

Hu County Lieutenant said: "It's not much, it's only thirty or forty catties, mainly because there are too few fire kilns in the city, which has made people look for them in the fire kilns around the city." ”

Yang Yun jumped directly from the battlements more than four meters high, and after landing steadily, he turned back to the county lieutenant Hu, who was looking at him dumbfounded, and said, "It's almost enough, and then send other raw materials to the county government...... It's time to get started. ”

Just do it, while the officers and soldiers in the city and the yacha are not deserters, Yang Yun is ready to use gunpowder to support the scene, he knows the formula of one sulfur, two nitrate and three charcoal, but he has not tried it before, and now that the raw materials are in front of him, he is not clear about the fineness of these things, and can only be matched according to the approximate proportion.

"Chief Lin Huo, come over for a moment." In the courtyard of the county government, Yang Yun asked Lin Huochang, a man whose real name is Lin Geng, to come over to help, and then called a few people to help.

Yang Yun said: "You grind things into powder and send them over, you don't care about the specific amount." Bring me the cinnabar pen and yellow paper, and I'm going to draw a charm. ”

Lin Geng and the others felt guilty for their offense yesterday, and they all wanted to help Yang Yun do something at this time, make meritorious contributions, and work extremely hard.

Charcoal, saltpeter and other materials need to be ground into fine powders first, which are all hard work, and it is only suitable for strong men in the government army to do it.

As for the issue of weighing and proportion, Yang Yun will not talk to these people in detail, in order to create the impression that this kind of thing is indeed a "stroke of genius", he also deliberately confused the public, found some "introduction", and wrote some yellow paper charms with a cinnabar red pen and burned them into ashes and mixed them in it.

When the sun rose, Su County's order appeared at the gate of the county office, and the people next to him reported to him: "Su County's order, everything that should be packed has been packed up, and now there is still no trace of the barbarians, if the barbarians do not come at night, let's go out of the city directly from the north of the city and escape." ”

Su Xian Ling nodded his understanding, then walked in front of Yang Yun, looked at the group of people who were busy, and asked: "Xiao Zhenren, this official has arranged for people to go to the north of the city to arrange straw, firewood and other things, and also planted flags on the city walls in other directions to confuse the Nanban according to what you said, how are you preparing here?" ”

Yang Yun had already prepared a bunch of black powder, although the color and smell looked similar to the black powder that was popular in later generations, but after all, the power had not been verified.

Yang Yun said: "The Su County Order came just in time, and I want to test the power of the spell here, so I will call the brothers who are temporarily not working in the city and take a look." ”

Su County Ling was stunned, and then arranged for someone to summon him, and after a while, the only seventy or eighty people in the city all gathered at the gate of the county ya, at this time Yang Yun used a bamboo tube to hold some "gunpowder", and took it to the yamen and sprinkled it on the ground.

"Bring the fire fold."

Yang Yunyi stretched out his hand and said to Lin Geng next to him.

Lin Geng handed a fire fold to Yang Yun, and Yang Yun blew the fire fold on fire, and threw it into the black powder pile under everyone's gaze.

Immediately, there was a loud "boom", and the small pile of black powder exploded in the air, showing a large fireball, and smoke and dust billowed out.

"Huh!?"

The people present didn't think it would happen, but they were all shocked when they suddenly saw this strange situation.

After a long period of shock, everyone's eyes fell on Yang Yun.

Su Xian Ling came directly over and pulled Yang Yun's arm and asked, "Little Zhenren, this is the legendary charm?" How could such a small thing just now be so powerful? ”

Yang Yun's tone was flat: "Since it is a magic weapon prepared by the master to defeat the enemy, the power is naturally not small...... Why, do you still have doubts? ”

Su Xian Ling had no confidence at all before, but suddenly he was full of confidence, and said with a smile: "Don't dare, don't dare, please ...... What are you still doing here? Get to work! If anyone says anything disheartening in front of the official to run away, the official will kill him and sacrifice the flag. ”

……

……

Yang Yun was already regarded as a guest, and after this incident, he was even more worshiped as a god, and Su County Commander and Hu County Lieutenant both became low in front of him.

Originally, Su County's order had room to prepare for escape, but after this incident, the worries were gone, and all hopes were pinned on Yang Yun, so that Yang Yun completely controlled the right to speak.

By noon, the north of the city had been laid with the necessary straw, firewood, dead branches and other materials, these flammable materials were sprinkled with tung oil, in order to avoid being discovered by the barbarians, the upper layer was laid with a thin layer of sand. As for the black powder prepared by Yang Yun, part of it was sealed in a clay pot and buried in the ground, and the rest was made into two kicks by Yang Yun.

"This thing only needs to be lit, and it can hit the sky, but be careful, it is easy to hurt people, and when the barbarians enter the city, they can use this thing to scare the barbarians, and they can also ignite firewood and grass from a distance." Yang Yun first demonstrated the usage to Su County Ling and some soldiers, and then explained the precautions to them.

Su Xian ordered: "Little Zhenren, if those barbarians are not afraid of death and rush forward, our soldiers can't resist it, as the saying goes, trapped beasts are still fighting." ”

Yang Yun said: "Annihilating the enemy pays attention to encircling three and one, we can't block the back road of the thieves, so that they can choose their own escape route...... In order to prevent them from fighting to the death, it is best to leave a hole in the firewood and grass array outside the city, and in addition, dig more traps in the city and set up a horse rejection to prevent them from rushing forward. ”

Su County Ling and Hu County Lieutenant did not expect that Yang Yun commanded the battle and was also the head of the Tao, not at all like the mountain and field Taoists.

However, thinking of Yang Yun's identity as a scholar, he was not so surprised.

……

……

Under Yang Yun's arrangement, all preparations were in place before sunset.

The officers and soldiers who were tired from the day either gathered at the head of the ruined city wall in the north of the city to look nervously, or they just found a random place to shelter from the wind and rain in the ruins of the north gate to take a breath.

Except for setting up an ambush in the north of the city, Yang Yun did not make other arrangements, if the Nanban did not attack the city from this side, all preparations would be in vain.

"Little Zhenren, you eat first...... It's just a simple coarse tea and light rice, and the conditions are not good, please bear with it! ”

At the head of the North Gate City, Su County ordered Yang Yun to send rice balls and pickles, in addition to a can of tea with ginger, onions, garlic and mutton fat, which tasted very weird.

After Yang Yun crossed over, he only ate a little simple thing in the morning to satisfy his stomach, and he was not a picky eater at this time, and he entered the city gate tower and hastily dealt with a group of military men to deal with his stomach.

A group of people stayed up late into the night in the rotation of resting and going out to inquire about news, and at this time they were already sleepy, but fortunately, no one dared to slack off at the moment of war.

Yang Yun looked out from time to time at the top of the city, trying to use his spiritual power to probe farther away.

Suddenly, in the dead of night, he felt a young girl running away in the wilderness.

A few barbarians were chasing after them, and the group moved closer to the city wall.

"Someone's coming."

The scout also noticed that something was wrong and hurriedly said hello.

Yang Yun didn't say anything, under the cover of night, he could only see a few vague black shadows with the naked eye, and the scout couldn't see the truth, he could use his spiritual power to probe more clearly.

But it was a thin girl, holding a clay bowl in her hand, as if she had come out to forage for food, and was found by the barbarians and chased all the way to a place more than a mile away from the city wall.

Just as a few barbarians were about to catch up and slash, the girl suddenly disappeared from Yang Yun's spiritual power lock.

This situation surprised Yang Yun.

"What's going on? Could it be that she knows how to do invisibility? Yang Yun was surprised in his heart, "People disappear out of thin air, as if they used stealth techniques, or directly opened a space door and escaped?" ”

Yang Yun didn't think much about it, the barbarians outside were frightened, and they muttered together for a long time, and after emboldening each other, they moved closer to the city wall.

With a few barbarians coming, there were countless dark shadows in the distance, slowly approaching the city wall, and the previous scene was like a small episode before the siege.

"Xiao Zhenren, the county order, the barbarians are here, I don't know how many people are pressed by the black, at least three or four hundred." The scout was unable to see the girl, so he did not know about the girl's disappearance, and only reported what he had seen.

"Prepare for war, show your spirit, and have the help of a little real person, there is nothing to be afraid of."

Su Xian Ling said that he was not afraid, but his body was already trembling.

The officers and soldiers and the yacha all held their breath, Yang Yun could only put down the girl's matter first, and continued to look into the distance, only to see a group of people in the distance quickly approaching the north city wall under the cover of night, but the number should not be the main force of the barbarians, just the vanguard of the path.

Su Xian Ling was very nervous, the thief had already appeared in the north of the city at the time Yang Yun said, and the way to escape was sealed, and he trembled in his voice under nervousness: "No...... The Barbarian Scouts can't be allowed to find out what's going on. ”

Yang Yun comforted: "Since the barbarians have come to plunder, they will not drag their actions into mud and water, as long as they are close to the city wall and no one is to fight, they will go back and inform the large army to advance...... They will think that we have left them an empty city. ”

Sure enough, as Yang Yun expected, the barbarians who explored the way just walked around under the city wall, and no one thought about entering the city from the gap to take a look, so they hurriedly sent some people back to inform the main force.

After about a quarter of an hour, the barbarian army finally arrived.

The black pressure pressed a group of people stopped about a hundred zhang away outside the city wall, and they were talking, because it was too noisy, Yang Yun couldn't hear what the other party was saying.

After a while, the barbarians approached the city wall with swords and shouts, and at first they were a little cautious, but when they saw that the city head did not react, they soon changed from bowing to swaggering.

When the barbarians reached the gap in the city wall, they still did not find any officers and soldiers appearing to stop them, so they felt that all the officers and soldiers in the city had fled, so they rushed into the city.

Yang Yun thought to himself: "A barbarian is a barbarian, this discipline is not as good as a horse bandit, and if you enter, you will swarm and escape." ”

"Come in, come in."

Su Xianling, who was beside Yang Yun, was very nervous, and pulled Yang Yun's sleeve and said.

"It's time to get to work."

Yang Yun saw that hundreds of people had entered the city through the gap in the city wall, so he knew that he could not delay any longer, so he took out a self-made second kick and lit it with a fire fold.

"Woo...... Syllable! ”

As a bright light rose from the city walls, a crisp sound pierced the air, and finally a popping sound was sent through the air.

Yang Yun's self-made two kicks became a signal flare for the war.

The barbarian was still surprised by the strange light and sound in front of him, when he heard a "fluttering" sound in the air, and the officers and soldiers who had been in ambush for a long time either fired two kicks or shot rockets with bows and crossbows, and a dense rain of meteors flew towards the gap in the city wall.

"Whew!"

Immediately, the firewood and grass buried in the ground were ignited, and with the help of tung oil, the fire instantly surged.

"Wow!"

The barbarians who rushed in front were quickly surrounded by fire, and they didn't even know what was happening, but as soon as their eyes lit up, the people were surrounded by flames.

At this moment, the gunpowder in the closed state of the crockpot at the high temperature was detonated, and a loud sound was made.

"Boom-"

"Boom-"

The continuous explosions came and went, and the huge air waves and shock waves directly lifted the barbarians away, and the fragments after the crockpot burst became the most terrible killing weapon, and those barbarians were already exhausted when they were still churning in the air, and they died before they had time to snort after they landed.

"Thor is angry!"

The faces of the remaining barbarians changed greatly, and they didn't dare to continue to rush forward at all, desperately trying to escape back and forth, but the city wall was narrow, and the forward rush and the fleeing barbarians collided together.

Yang Yun saw that the city wall was already extremely lively, looked around at the soldiers who were still in a daze, stood up and shouted: "What are you looking at?!" Work! ”

Only then did Lin Geng and the others react, and hurriedly lit the rockets and two kicks that had been prepared in their hands long ago, and shot them in the direction of the outside of the city wall, and then the outside of the city wall was also surrounded by fire.

After a while, the clay pot buried in the outer wall of the city wall detonated again in the heat, and another violent explosion sounded.

For a while, the fragments of kicks, rockets, clay pots, and firewood that was violently burned by the explosion wave flew everywhere, and before the tea was ready, the inside and outside of the city became a sea of fire.

The city wall was sandwiched between two fires, even if the fire did not burn the city for a while, it was no longer a good place to hide, Yang Yun and Su Xian Ling and others fled along the city wall to the west according to the retreat route formulated in advance.

When Yang Yun looked back at the battlefield, he could only see active fireballs running in the fire, and countless barbarians were buried in the flames, and the screams were one after another, which was extremely harsh.

Later, the barbarians found that they had encountered a sneak attack, and their companions were engulfed in flames, and they had the heart to rescue, but when they heard the terrifying explosion, they really thought that Thor was angry, and no one dared to go against the sky, so they turned around and fled for their lives......