After a day of revolving around, the three armies in Beizhou City took the lead.

At night, the air boat was slowly withdrawn. Almost all the soldiers rushed over, watching the giant creature, and the joy was thunderous. Shi Heng brought down ten soldiers and was treated like heroes together.

The next day, we continued to fly.

This incident was too shocking. The next afternoon, I received an imperial edict from the court, asking if this balloon could fly to the capital after destroying the rebels. Zheng Lang was stunned. He had to pass through Daming Prefecture, Dezhou, and Huazhou to get to the capital. He spanned hundreds of miles. It was okay to walk within a radius of dozens of miles, and it was okay to fly hundreds of miles... He thought about it and gave an answer, and it was good to see the weather. If the weather was good, it could be done, but if the weather was bad, it would not be done.

It is possible to adjust the direction. The first premise is that the breeze is breeze, and it is still impossible to do it when the wind is strong.

If the wind is not strong, it is still OK to do some supplements along the way. Zhao Zhen probably also wanted to see a novelty, while Zheng Lang took the opportunity to promote the power of science, which made more and more people interested in studying matter. Now there are people in the Taixue School who are studying matter, but there are too few. Shi Heng wanted to study a thing, but even he could not find a helper.

The impact is significant.

Someone will learn immediately.

On the third day, the sixth day of Zheng Lang's arrival in Beizhou, the wind became strong and he had to fly for only one time and stop. Then it became dark and a slight rain started to fall. The spring rain was as precious as oil, but Zheng Lang looked at the various Buddhist flags in Beizhou City and sighed.

At night, the rain gradually subsided, and suddenly the soldiers came in and reported: "Mr. Zheng, look at the city."

Zheng Lang walked out of the camp and looked into Beizhou. More than a dozen hot air balloons rose in Beizhou City, and hot air balloons were rising one after another.

Wang Ze was also forced to do nothing. Several bed crossbows were all damaged, and some powerful crossbows and large stone throwers could not reach an altitude of more than 100 meters. However, the air boat was always floating above a height of 100 steps, and there was no way to deal with it.

It happened that a balloon was seized in the city. It was not difficult to imitate it as it looked, so I plundered the animal skins in the city and created a large number of hot air balloons. It was impossible to let them fly like air boats. They continued to hang them on ropes below. But the number was large. Once the air boat arrived, intercept the air boat and must destroy the behemoth, otherwise the subordinates in the city would seize the energy and would not be able to fight.

Zheng Lang suddenly laughed and said, "I want to fight in the air?"

Want to fight in the air. Be with you.

On the seventh day, it was another good weather, and the air boat rose. But different. This time, for the sake of height, the second cotton protective layer under the air boat was removed and the air boat was loosened.

Even cut the ship's side by half.

The controlled soldiers were reduced to eight.

There are some supplies and some stones on it.

It slowly rose, because a large number of stones were pressed, the height was still maintained at about 300 meters, which was equivalent to these balloons. The rope was not loose. I slowly came to the top of the city and threw the stone. The weight was gradually reduced, and the city had to connect the rope. Continue to put it, and the heights of both sides were increasing, gradually reaching 350 meters, and some balloons could not rise. It had nothing to do with the rope, mainly because the balloon was too small to carry the two soldiers of the Lan to rise to a higher height. But in order to confuse the other party, Shi Heng ordered: "Stop."

Then slowly pulled the rope onto the gondola and flew over to the row of hot air balloons.

In fact, there is another way. Create a small bed crossbow, and the crossbow head is changed to a more scientific rocket, aiming at these hot air balloons to launch. If the distance is kept within one hundred steps, the bed crossbow will have some accurate heads.

But Zheng Lang abandoned this method and thought it was too cumbersome.

Wang Ze directed the soldiers to drag the balloons over, a total of twenty-one balloons. It took one day and midnight to make it yesterday, and I wanted to fight one. That's it, the morale in the city was still falling sharply. The size of the two were too big, one was an ant and the other was an elephant. However, the rebels had the method of the rebels. The two soldiers were fully armed, holding a grab hook and a big knife in their hands, and were preparing to force the boat to get close to each other without fear of death.

Seeing as he approached, Shi Heng said, "Let me go."

Open the boat board directly and push the stone down. In the blink of an eye, the air boat height will reach another 100 meters.

This suddenly pressed all the hot air balloons under the body. Fortunately, the wind is still very small today, otherwise the airflow at this height will be strong and difficult to control. Several pipes will be opened together, steam will be released, and sails will hang, increasing its speed and quickly reaching above these balloons.

Shi Heng shouted again: "Let me go!"

Rockets were shot down.

The rebels in the city saw that something was wrong and wanted to take the balloon back, but its size was too large. Although it could not be compared with the air boat, since the balloon could bring two soldiers to a high altitude, it was also quite large. Half of the Song army's rockets were in control. They kept controlling and flew from south to north. In just a moment, all twenty-one balloons caught fire.

Seeing this wonderful scene, almost all Song Bing shouted together: "Long live the Song Dynasty."

It's so exciting and spectacular. It's worth seeing this scene when I only saw this scene. I was watching it as a blockbuster movie from the eleventh century.

Ignite all the balloons without haste, and adjust the air boats, fly from north to south, emit hot air from the pipeline, lower the height, and smash the stones all the way. As a result, the rebels below ignored the brothers in the sky and couldn't stand it and let go of the rope. Some balloons were carrying fire and actually floated outside the city, captured by the Song army alive, and some were shocked to death because of the fire and the falling speed.

It was better if Wang Ze did not create a pseudo-air battle, but his morale fell even further.

The air boat returned again and reloaded. This time, the pressure was loosened, and the installation discretion was larger, and there were more soldiers up, reaching sixteen. The air boat was large and the ship was not small. With the soldiers on it, it was more like an air boat towed a boat into the blue sky.

He was in charge and flew everywhere above Beizhou. He saw rebels, and then poured sulfuric acid and gunpowder down or threw them down. In fact, at this point, many rebels in the city were ready to surrender, but they were afraid of the power of Wang Ze, and dared not speak out, and barely defended Beizhou City.

After walking around in a circle, I returned to the load again, and saw the air boat flying over. A few rebels were completely out of morale. They put down their weapons and shouted outside the city: "Let's surrender."

As he said that, he jumped onto the Tushan Mountain and rushed towards the Song army camp. Wang Ze could not stop him.

When Zheng Lang saw that the temperature was almost the same, he did not load weapons this time, but further lowered the height of the airboat. It was as low as about 150 meters, and asked Shi Heng to bring a loudspeaker to shout that the city would be destroyed in the afternoon. All innocent people and surrendered demons had white belts on their heads and concentrated in the west of Beizhou City. No weapons were allowed to be held and the court was allowed to be arranged by the court.

After shouting in the city for a while, he rose again, monitoring the movements in the city.

Chaos began to begin in the city.

Before the Song army came in, many people fled to the west city.

The king would never let this happen, and sent soldiers to stop it and drove the residents of Xicheng out. The people refused to listen and raised their butcher's knife and began to massacre.

Zheng Lang stood on the top of the highest earthen mountain outside the city, watching the scene, shaking his head. Although it was a little more tragic, or in this way, the people could wake up. When it was time for lunch, Zheng Lang summoned the generals to prepare for the general attack.

After all, people have selfish intentions, Zheng Lang puts Zhang Kang outside the East City Gate.

After the dispatch, Wang Xin led the army to blew the charge horn and took the Song army to the earth mountain. The air boat returned and came to the north city with sulfuric acid again and dripped downwards.

At this time, there were still many ignorant believers who were fighting stubbornly.

I did not attack the city immediately. I dripped sulfuric acid from above, and shot with bows and arrows below.

In fact, I have no intention of really attacking the North City Gate, and the main attack direction is in the South City.

When he came, Minghao dug the tunnel for several days, leading to Beizhou City, but had not yet passed through the city wall. Zheng Lang used an air boat to attract both the enemy and us in the past few days. He secretly dug the tunnel to the foot of the city wall and stopped.

The dug out mud is piled up in the tent and transported out at night.

However, Wen Yanbo did not study at night to select 200 heroes, entered the city from the tunnel, climbed up to the city again, killed the defenders, and led the official army to the city. It is possible that some strategies were used, but the rebels did not set up any defenses that night, resulting in a large number of Song troops climbing up to the city and opening the Xicheng Gate. In a hurry, Wang Ze used the fire cattle strategy to rush into the official army, but failed to achieve success. So he was defeated and fled outside the East City Gate.

This plan has unlimited variables and is not required.

Zheng Lang adopted the strategy of Hong Xiuquan attacking Nanjing city, gunpowder.

The city wall of Nanjing was far taller than the city wall of Beizhou, and Hong Xiuquan could not defeat it. Finally, his subordinates came up with a plan to steal a coffin from outside the city. The coffin was filled with black gunpowder, and used the coffin to enlarge the pressure of the black gunpowder and shake down the tall Nanjing city wall.

This is also the first time in human history that the air pressure generated by the explosion of black gunpowder was used to collapse the city walls. Although it came out very early, it has never been fully understood. Otherwise, human history would have been greatly rewritten.

It's easy to say but hard to do.

It’s not that simple either. For example, the Zhonghua Gate in Nanjing City may not collapse even if it is placed in the coffin below.

There must be other inside stories about this, such as the wall foundation is in a weak place, that is, the soil is wet, the city wall has evolved for many years and is not as strong, or other things are not recorded in history books. However, after receiving Zheng Lang's instructions, Shi Heng rode his horse to a coal mine with his sister-in-law, tried several times, and obtained some detailed data.

In the morning, Zheng Lang secretly sent someone to arrange the matter below.

He would not learn from Hong Xiuquan and steal the coffin of people from the city, but instead deliberately created several heavy wooden boxes, which were much larger than the coffin, and were filled with black gunpowder. The wooden boxes were also carefully set up, with thicker around and below, and only the wooden board at the top of the center was thinner, ensuring that the air pressure was aimed at the upper city wall when it exploded.

Not only that.

On the fifth day, another feint attack was launched outside the south city gate. The air boats covered it and knocked down wooden stakes, preparing to build several high platforms, and forcibly climbed the city. However, under the rebels in the city, they failed and only a few wooden stakes were pierced.

It's enough, these wooden stakes are marked, otherwise people will not be able to measure the location of the city wall below. If they are slightly higher, the air pressure will break out of the ground instead of rushing towards the city wall, which will have no effect.

The soldiers entered, filled the gunpowder, led out the fuse with bamboo tubes, and tamped the soil with glutinous rice juice and lime inside. Then they filled the mud with quicklime and glutinous rice juice, sealed it outside, and even moved a few stones to make the passage stronger. They slowly retreated and retreated until fifteen meters away before they stopped tamping.

Three authentic tunnels were prepared and the soldiers retreated in succession.

Zheng Lang looked at the sun. The north was so hot that it was shooting towards the sky, but in the south, it was quiet. A few birds flew over curiously, hovering in the sky, watching everyone singing with their melodious voices. The coldness of winter gradually passed, and there was still some coldness in the air, but you could smell the intoxicating breath of spring.

Zheng Lang murmured: "One general succeeds and thousands of bones are woven."

No matter how he lets go, many people will die today.

After saying that, with a wave of his hand, the soldier lit the fuse.

Zheng Lang shouted: "Cover your ears."

The black gunpowder used in Shimenchuan is not large in quantity, but the sealing ability is stronger than that of Shimenchuan. If there is yellow gunpowder, the effect is better, but there is no detonator. I can only sigh.

At the same time, three loud noises came out.

The effects of the three blasting points are different. Although one blasting point has been corrected with wooden stakes, something went wrong. The direction of the explosion is tilted to the outside of the city, and it flew into the sky with countless mud masses, and the city walls shook. It was safe and sound.

There is also a blasting point aimed at the city wall, but because the city wall is too strong, only part of it collapses, and a small gap appears, which has an effect, but is not very large. The gap is too small, and it can only pass through three or four people. It is easy to block the enemy.

But the other part worked.

The huge momentum surged towards the city wall, and the city wall was like sand piled up. It shook and quickly collapsed, and a large gap of more than four meters wide appeared. It was enough. At this time, the main force of the rebels was in the north city, and there were not many rebels in the south city, and they were also shocked.

When the explosion just now, a powerful airflow rushed up. Some soldiers were blown to the sky by the airflow, screaming and falling to the ground without moving. Some soldiers were buried directly by the collapsed city wall. Even if a few rebel generals were awake and shouting orders, the soldiers' ears were buzzing. They could not hear it.

The opportunity passed away in a blink of an eye. Once you react, you can block the gap with a wooden fence, which is not easy to attack into the city. Zheng Lang shouted: "Attack."

Wang Kai and Hao Zhi led the Song army to rush towards the gap quickly.

In the blink of an eye, the Song army entered Beizhou City through the gap.

Seeing the Song army enter, many people tied their heads with the leucorrhea strips that had been secretly prepared in their arms and fled to the west city. It turned out that they thought the king was Maitreya Buddha, and they fought for it one by one. But in the past few days, more than 90% of the people would not think that the king was Maitreya Buddha, and they woke up and knew the seriousness of the matter even if they were illiterate. What is this place? Hebei’s strategic location is only a few hundred miles away from the capital, and it is an important northern gate of the court. Can the court be good if these people rebelled?

They all hated that their parents had less legs and fled desperately. Many rebels hurriedly took off their armor, dropped their weapons, and tried to get caught among the people. However, armor was not clothes, and it took a while to put them on and unload them before they could combine or remove them. Seeing that the Song army arrived, they were nervous and cried in fear while taking them off.

Ming Hao looked at this scene and knew that Beizhou City was almost the same as taking it down. He no longer cared about it. He turned his head and looked at Zheng Lang and said, "Xingzhi, this gunpowder technology cannot be spread."

It made him feel scared.

It is very likely that this can be used to capture Lingzhou City, but if the Khitans are allowed to go or the Xixia people are allowed to go, they can also use this technology to capture the Song Dynasty's city walls. Compared with the tall and sturdy city of Beizhou City, how many city walls can the Song Dynasty keep up? Especially those forts on the border, it is almost a matter of every break.

Zheng Lang nodded and said, "Not only all soldiers involved in the blasting must sign confidential documents with them. However, with the development of studying physics, the role of the city wall will gradually decline."

"Xingzhi, what should I do?"
To be continued...