After the model army captured the first earthen wall, they did not immediately attack the second earthen wall, because the second earthen wall was closer to the fortress, and the Hongyi cannons on the fortress could already support the Qing army relatively effectively. Although it is not impossible to take down the second earthen wall if some generals of this era do not care too much about the casualty figures, Zheng Sen is unwilling to pay too many casualties for this. First of all, compared with the army under other generals, the training cost of the soldiers of the model army is much higher, and the casualties are too large and distressing; Second, the Model Army has maintained a high morale, not only because they are well paid, nor because their officers have been brainwashed by some narrow nationalism in military schools, but also directly related to the limited casualties on the battlefield of the Model Army. Zheng Sen didn't want to pay more casualties just a little earlier.

As for how to fight, Zheng Sen felt that when he had technical and material advantages, the best way to fight was to fight steadily and steadily, relying on the advantage of material strength to deal with the enemy. Moreover, Zheng Sen also has a sharp weapon specially prepared to capture this fortress, that is, two large siege heavy artillery.

These two large siege guns were specially forged for this offensive operation against the Manchus. It was a giant cannon that fired a four-hundred-pound cannonball. This number is much smaller than the 1,500 pounds of urban cannon that broke through the Byzantine walls that year. But because of the progress of barrel technology and gunpowder technology, their range is far greater than that of the Urban cannon, and of course, the power is still not comparable to the Urban cannon. Of course, compared to the 17-ton Urban cannon, this cannon is also lighter, weighing only about six tons.

However, this cannon is already a behemoth, at least on the battlefields of the Far East, there has never been such a heavy artillery. In order to transport the urban cannon from the artillery factory to Constantinople, 140 miles away, the Ottoman Turks used 400 men and 60 cattle as a transport team, and also sent a special team of engineers to repair the road in advance, and it took six weeks to transport the cannon to the city of Constantinople. In contrast, Zheng Sen's siege artillery was much lighter, and only sixteen horses were needed to pull it. Even if the road conditions were good enough, they would pull such a cannon and walk no slower than the infantry march. However, the road between Niuzhuang Fort and Da Liaohe Fort was badly damaged, so it would take two or three days for the two guns to be in place. This was the right time to build artillery positions.

The artillery position built by the Model Army is actually a high earthen platform, which is two earthen platforms more than one zhang high, first dig some deep pits in the ground, bury some thick wooden piles as skeletons, and then connect these wooden piles with iron wire, and then fill them with wicker baskets filled with gravel as a foundation, and then spread river sand and soil to roll them firmly. It can withstand the huge recoil of siege artillery.

Naturally, such a project could not be concealed from the Manchu Qing Dynasty, and the purpose of this facility was also clear at a glance. The high platform must have been built to install the cannon, because the higher the position of the cannon, the longer the range of the cannonball. It's just that the position of these two high platforms is beyond the range of the Qing army's artillery, and if you want to take any action, you can only send troops to attack. It's just that the Qing army has a deep understanding of how strong the defense capability of the model army is. In today's situation, the Qing army really did not dare to attack the position of the model army.

"Your Majesty, even if we rush up, will we have time to tear down these high platforms? Definitely not! Therefore, the younger brother thinks that it is better for us to wait and see what happens. Azigo, who was on the fortress and looked at the two high platforms from afar, said Azige.

"Not bad. Your Majesty, our fortress was built in accordance with their methods, and according to the results of our test firing, our fortress is not easy to destroy with artillery. I don't believe they have so much gunpowder to fight slowly. Besides, are we still afraid to fight slowly? Dodor chimed in.

Huang Taiji nodded, but he didn't speak, just sighed. He naturally knew that the wall of the Great Liaohe Fort was built with a fairly gentle slope to prevent artillery, and it was almost impossible for a large side to collapse as soon as the cannon hit. However, the first to play this kind of city wall were the guys on the other side, and they naturally knew this, but they still built two high platforms like this, and I am afraid it is not easy to deal with.

At this time, there was a commotion from the high platform opposite.

"What's going on over there?" Thinking like this, Huang Taiji hurriedly raised the telescope in his hand.

There was a lot of dust behind the platform, but his vision was obscured by the platform, so he couldn't see what was going on over there. After a few more moments, several heads of horses appeared in his sight, then the bodies of horses, and then several giant horses appeared in his binoculars.

"Holy shit, this horse is so big, bigger than a cow! Is this still a horse? Don't be a youkai! Huang Taiji's voice came from Duoduo's ears, and Huang Taiji looked sideways, but saw Duoduo also holding a telescope to look that way. Huang Taiji frowned, but did not speak, but continued to raise the telescope to watch.

The high platform over there was quite spacious, and the horses stopped on it, and then they were led down one by one, and a huge cannon appeared in Huang Taiji's eyes. Although they didn't know how big the cannon was, just looking at the thick barrel of the cannon, they knew that it was much larger than any cannon they had seen before.

"I'm afraid this cannon barrel can fit into a person! How can there be such a thing in this world! Dodor exclaimed.

"There's another one over there." Azigo also said.

In the telescope, a group of Model Army soldiers began to use slides and winches to adjust the position of the two cannons for test firing. Huang Taiji noticed that a flag had risen to the high platform, and after a while, a young general wearing a full-body plate armor appeared next to the cannon. When the surrounding sergeants saw him, they all saluted him. The young general seemed to say something to them, and the soldiers around him cheered.

"Is this Zheng Sen?" Huang Taiji narrowed his eyes, waved his hand to Hong Chengchou, who was waiting on the side, and said, "Mr. Hong, come and see, is that the prince of Anping?" ”

Hong Chengchou first knelt down, took the telescope from Huang Taiji's hand, stood up and looked at it carefully, then knelt down again, held the telescope with both hands and returned it to Huang Taiji and said, "Your Majesty, it is Zheng Sen." ”

Huang Taiji didn't speak, just held the telescope and looked at it for a while before sighing: "Sure enough, it's a young hero!" It's a pity ......"

At this time, Zheng Sen's speech seemed to be over, and from a distance, I saw Zheng Sen and his red flag getting off the high platform and retreating a long way behind, and the artillerymen on the high platform had already begun to load the cannon with gunpowder.

"Your Majesty, I'm afraid the enemy is about to open fire. I didn't know how far this cannon could hit, so I asked the emperor and several princes to go down from the city wall first to make sure it was safe. Hong Chengchou said suddenly.