While fighting was raging on the Mongolian steppes, the battle in front of Shanhaiguan was getting hotter.

Mang Gurtai had been blocking the wall with an army of 30,000 for five days, and he finally transported more than 20 long-barreled cannons from Ningyuan to the front of Shanhaiguan in these five days. Just for these cannons, hundreds of slaves fell along the way.

With artillery, Mang Gurtai has a great deal of confidence. Although Ngadri reminded him that there were also cannons on the Shanhai Pass, he said that he had a way to deal with it.

"There are many shaman priests in my army, and they can use magic to pull up the earthen wall near Shanhaiguan at night. Then let the minions below pour water overnight, and it will freeze hard at dawn. The Han people have city walls, so can we. Our cannons can hide behind this frozen soil wall and open fire, blasting the Han people's wall to pieces. ”

Manggultai's idea was so striking that Engdry exclaimed, 'The idea of the Three Beylers is naturally excellent.' So they arranged for the shaman priests in the army to sneak up about 1,500 meters in front of the wall overnight and began to build the frozen soil wall as a fortification.

In the past few days, the 'revolutionary army' inside the wall has been turning a blind eye to the Jurchen army to the north, as if the other party did not exist. At first, Mang Gurtai was worried that he would suffer if he didn't have a cannon. But now that there are cannons, he will laugh at the defenders of the wall for not knowing the soldiers. "If they had come out a few days earlier to fight me, it would have been difficult for me to deal with it, but now I am not afraid."

At night, there was no flare that could cover a distance of more than 1,000 meters, and the 'revolutionary army' did not interfere with Jiannu's wall-building operation. However, when it was dawn the next day, Zhou Qingfeng and the others inside the wall would be able to see the results of Jiannu's tiring night.

The frozen soil wall is not high, only about one meter, but the wall is at least half a meter thick. This kind of breastwork-like fortifications is not an isolated row, but a continuous line of hundreds of meters, seven or eight rows in front and back. More than a dozen such fortification groups appeared in front of the entire Shanhai Pass, and a large number of Jurchen elite soldiers gathered like ants behind each fortification group.

"That's right, it's long-lasting." Zhou Qingfeng glanced around with a telescope and found that the fortifications built by the Jurchens were quite threatening. "As long as we advance two or three hundred meters a day, it won't be long before they can force us under the wall. If we send troops to demolish it, we are afraid that we will be shelled by them. ”

As soon as he finished saying this, a gun emplacement on the opposite side suddenly opened fire. A black projectile could be seen flying from afar, and a few seconds later it hit the wall of Shanhaiguan with a rumbling cannon sound. The outer wall of the wall was immediately hit, leaving a pit that was neither deep nor shallow, revealing the gray-white rammed earth inside the wall.

Gao Daniu stood aside and wanted to laugh like Zhou Qingfeng, showing his contempt for the enemy, but when he saw the effect of the shelling, he immediately said with a solemn face: "Commander, please retreat to the wall." I immediately ordered the fortress artillery on the walls to return fire. ”

Zhou Qingfeng turned around and left without saying a word, not causing chaos to his subordinates. The fortress cannon on the wall soon sounded a dense cannon sound, and he returned to the general army yamen in the pass, and a staff officer stepped forward to proclaim: "Great marshal, the Hezhuo front army in the west has entered Qingcheng in the Karaqin department, and just now Shennian has sent a message that it is engaged with the Jurchen Mongol coalition army entrenched in Qingcheng. ”

Zhou Qingfeng was not worried about He Zhuo, but he asked. "Did the biplanes that went out to Haigai and Dandong to reconnoiter come back?"

"I'm back." The staff officer said.

"Fill the cabin with explosives, I'm going to fly out ......." Zhou Qingfeng was halfway through his words, Xu Bing ran out of the study of the yamen, and drank with a cold face: "Nonsense, what is your identity now?" Don't go! If you want to go, let the flat hair go. ”

When Xu Bing heard the sound of cannons outside the city, he knew what Zhou Qingfeng wanted to do. She stopped Zhou Qingfeng and threw this dirty work to poor Bianmao. The partial flat hair was very happy about this, and after hearing Zhou Qingfeng's idea, he happily wanted to throw explosives on other people's heads.

Outside the wall, Mang Gurtai entered the frozen soil fortifications he had built before dawn. He was also very unfamiliar with the construction of field fortifications. The idea was actually devised by Dutch instructors, and several gun emplacements were built not only with erected breastwork, but also with wood and earth to defend against incoming shells on the left and right.

At the gap in the gun emplacement, Mang Gurtai could see the wall in the distance. He had to admire that the Han people had a stronger ability to build fortifications, that is, the wall on the opposite side stuck the road to the south of the Jurchens - no matter how chaotic Liaodong was, as long as Shanhaiguan was not lost, the Central Plains would be safe and sound. Even if the Jurchens make a detour to Mongolia, they will not be able to stay in Gyeonggi for a long time.

"Let's shoot."

For the first time, Mang Gurtai commanded the artillery. Although he didn't understand it, he had seen a lot of the Ming army's firearms fighting, and he had been taught by the Dutch, so he knew that this shelling had a lot to do with factors such as distance. In these years, artillery that can hit 1,500 meters is already a heavy weapon of the militarism. Therefore, the Jurchen army is full of confidence in its artillery - what the enemy has, we also have, naturally they are not afraid.

The rumbling cannon sounded, and more than a dozen black lead balls flew towards the wall of Shanhaiguan. The first shelling was not very accurate, some of the projectiles jumped over the wall, and some hit the wall before the wall. However, compared with the artillery of the Ming army, who did not even know how much gunpowder to use and how many angles to adjust, the Dutch instructors still trained some professional gunners.

The shelling was so loud that Mang Gurtai had to stay at a specially built observation point to assess the effects of the shelling. According to the opinion of the Dutch instructors, to destroy such a huge checkpoint as Shanhaiguan, I am afraid that it will take half a month of non-stop shelling - provided that the other side does not return fire.

The fortress guns on the closed walls returned fire quickly, almost less than two minutes after the gunners opened fire, and very accurate shells were fired from the opposite side - the fortress guns could weigh several tons, could use expensive forged barrels and precise rifling, and could also fire solid egg-shaped shells that had been machined with a high degree of consistency.

Mang Gurtai did not wait for the second wave of artillery bombardment on his side, and he saw that the shells of the 'revolutionary army' accurately hit within a few meters of his own artillery position. He saw with his own eyes that a shell hit the frozen soil breastwall on the side of a gun emplacement, and the half-meter-thick wall was pierced, blasting countless hard frozen clods.

Jiannu's gunners were all taken aback by the bombardment, and the blasted frozen soil was flying all over the sky, and when it fell, they almost ran away. It took a long time to find that his own people were fine, and the cannon was fine, but the fortifications that had been repaired overnight were missing a big hole on the side. Fortunately, the frozen soil wall was very hard, and there was more than one, which saved the gunner and the cannon in this position.

But this is just the beginning......

Soon, Mang Gurtai found that the artillery on the wall of Shanhaiguan was particularly accurate. All of them were aimed at the artillery empositions and fortifications that he had worked so hard to build all night. Although the shell could not fly three miles to hit the small gap in the gun position and destroy the artillery that Dajin Kingdom had managed to obtain, it was not difficult to hit the gun position itself.

"Everyone is a cannon, why is the cannon of the 'revolutionary army' so accurate?" Manggultai still remembers the Dutch instructor patting his chest and assuring him that the accuracy of artillery in those years was limited. It's no problem to hit a target the size of the wall three miles apart, but it's not easy to hit a target like an artillery position. Now it seems that this 'not easy' refers to Jiannu, not to the 'revolutionary army'.

Jiannu's heavy artillery can fire in five minutes, but the heavy artillery on the opposite side can fire one shot in one minute. The density of firepower on both sides is also not an era. Mang Gurtai hid in the observation point, and immediately felt what is called 'bullets raining down', because the cannonballs on the opposite wall were obviously more accurate and accurate.

Mang Gurtai didn't know whether to rejoice or be annoyed. He was glad that he had managed to repair the frozen soil fortifications, but he did not expect that the 'revolutionary army' on the opposite side would use artillery to demolish his fortifications. Originally, he thought that he had built such a good fortification, and he couldn't beat it with a peerless master with top-level magic, and he couldn't dismantle it by manpower at all - yes, the 'revolutionary army' didn't use manpower to dismantle it, and people used artillery.

The gun emplacements are protected by frozen earth walls, and they cannot be destroyed for a while and a half. Manggultai could still hear a dozen of his own artillery guns firing shells, and the shaman priests hurried to the front line to boost the morale of the gunners, or to re-erect the earthen walls and repair the fortifications. Just when Mang Gurtai felt that he could still hold on, there was a whistling sound of air currents in the sky.

This whistling sound attracted almost all the Jurchens on the battlefield to look up, and no one could tell what was coming from the sky. Mang Gurtai reacted quickly - whatever it was, it was definitely not our Jurchens.

This Sambel had thought before that he was only afraid that he would continue to see the endless tricks of the 'revolutionary army'. Seeing something strange in the sky, he untied the strong bow he was wearing, and quickly drew his arrow and fired it.

The bow used by Mang Gurtai is unusual, the so-called 'Jiaolong tendon' and 'Cangshan wood', which took more than ten years to make. The bow is extremely powerful, and ordinary people can't pull it away even with their hard work. He shot an arrow, and the arrow rose into the sky with a howl of wind, piercing through the heavy armor.

What about the heavy armor? The arrow flew more than 100 meters high, but it still couldn't resist the gravitational pull of the earth, and it turned around and fell. It's still far from that weird thing in the sky.

Mang Gurtai was about to draw another arrow, but the strange thing had already flown away at high speed, and the gang's kung fu was hundreds of meters away. He stood on the ground and suddenly fell into a state of confusion, originally feeling that his combat strength was unparalleled, and there were few opponents in the world - now it's good, people are flying in the sky, what should you do?

"What about the Crane Rider?" Mang Gurtai rushed out of the observation point on the front line, and hurriedly wanted to find someone to deal with the thing in the sky, "Where is the crane messenger?" Fly up and get rid of that strange thing. ”

The number of crane riding messengers in Jiannu is small, and they can only run and communicate, and they don't know where to go. Mang Gurtai took a dozen personal soldiers to look for people everywhere, and after a while, he found that the monster in the sky had come back in a circle, and this time it flew lower, about 100 meters above the ground.

"Archery, archery! Shoot that thing down. Mang Gurtai was in a hurry, and under his loud shout, many Jurchen elite soldiers who were busy on the front line found their bows and arrows - arquebuses could not hit high-angle targets, and Jiannu still kept a large number of bows and arrows, which were just used in the current situation.

And as hundreds of arrows kept flying, the strange thing flying in the air opened the tail hatch. A 'Revolutionary Army' soldier lit the fuse of the explosives pack in the cabin and pushed them out.

The monsters in the sky immediately threw one black and deadly thing after another like hens laying eggs. Mang Gurtai saw the opportunity quickly, and immediately flew away, hiding hundreds of meters away in the blink of an eye. But his subordinates didn't have the ability to do this, so they could only stand in place, watching death fall on their heads.