Spring goes to autumn, the northern land is already an autumn scenery at this time, the original green mountains and fields seem to be re-dyed by the creator with pigments at this time, red and blue mountain flowers, yellow and purple autumn leaves, mixed in the mountains, indescribable beauty. （/\）

On the bank of the Lu River, in the valley basin, on the construction site, more than 10,000 people are in full swing to build Liujiabao.

On the side of the city wall east of Liujiabao, Liu Renyu looked at the city wall that had risen from the ground, and said to Zhao Datie with great satisfaction: "Daddy Zhao, it's really hard for you, this city wall has finally been repaired." ”

"General, don't say that, it's been more than half a year, my bad old man has only repaired a city wall, and other places are just laying a foundation, general, if you don't cure my old man's sins, I can't be grateful, how dare you take credit!" Zhao Datie listened to Liu Renyu's praise and replied with some embarrassment.

"Hey, Daddy Zhao is serious, there are too many steel bars needed to build the city wall, you have limited manpower here, and you can use 7 months to lay the foundation, I am already very surprised, and now you not only lay the foundation, but also build a city wall, which is already very surprising to me."

"Alas! General, what you said is also true, if only I give my old Zhao Tou enough manpower, it would be good to make steel bars quickly. Zhao Datie thought that he was subject to the lack of steel production capacity, and sighed helplessly.

"It's okay, it's okay, building a city is a big project, and if you want to repair all of Liujiabao, you can't do it without two or three years of effort, so we can only take our time."

"Hey, as long as you're not in a hurry, adult." Zhao Datie nodded.

"Well, as long as this city wall is repaired, it is enough, I boasted to Hong Junmen before, saying that the city wall made of reinforced concrete is like a copper wall, and even the Hongyi cannon cannons can't easily penetrate it. A few days ago, I heard that the city wall had been completed, so I sent someone to report to Hongjunmen that he had borrowed a Hongyi cannon from Xi'an, but he wanted to try the quality of our city wall! ”

"Hongyi Cannon!? This is a great militaristic weapon, which can be eroded for dozens of miles with one shot, and its power is amazing. Father Zhao smacked his tongue and said.

"Yes, but I have a lot of confidence in our reinforced concrete city wall, and I firmly believe that even if the Hongyi cannon bombards this city wall, it will be difficult to collapse." Liu Renyu said confidently.

You know, Liu Renyu in later generations is a German fan, very obsessed with World War II Germany, when he read a book about the Soviet army's attack on Berlin, he found that the book said that the German Reichstag, a reinforced concrete building, can actually stand tall under the bombshell air raids of the Allied forces for several years and the attacks of tens of thousands of artillery shells, rockets, and armor-piercing shells by the Soviet army at close range. It can be seen how strong the reinforced concrete structure is.

Of course, the reinforced cement made in Germany under the industrialization conditions of later generations is naturally stronger and harder than the hand-made steel and cement of today, but the current Hongyi cannon cannot be compared with the cannon of later generations.

It's black now. It is a fool's dream that a spherical cannonball propelled by gunpowder wants to penetrate the reinforced concrete city wall up to 3 meters thick.

However, Zhao Datie didn't know what Liu Renyu was thinking, he looked at the city wall in front of him that was so easy to build, and sighed in his heart: "Alas! It's easy to fix you, and in a few days you'll be broken by the Hongyi cannon. （/\）”

*********

Besides, Hong Chengchou received news from Liu Renyu that the city wall of Liujiabao had been repaired, so he asked him to bring the Hongyi cannon to Liujiabao to test the hardness of the city wall.

At this time, Hong Chengchou also happened to want to ask if the matter of Liaoyu had been done, so he arranged the military affairs, and then in view of the fact that the Hongyi cannon and other big killing weapons were too precious, Yulin did not have them, so he could only find Liu Guangsheng, the governor of Shaanxi, from Xi'an to use them.

Liu Guangsheng saw that Hong Chengchou had helped the bandits in Shaanxi last time, so he asked people to remove a Hongyi cannon from the city of Xi'an and send people to transport it to Jingbian Fort first.

In this way, Hong Chengchou and Hongyi artillery divided into two routes and met at Liujiabao on November 15.

Hong Chengchou came to Jingbian Fort again, and Liu Renyu naturally wanted to take all the civil and military officials of Jingbian Fort to greet him.

On November 16, on the side of the Liujiabao city wall, 1,000 steps away from the city wall, a Hongyi cannon with a length of two feet, a dark body, and a huge muzzle stood silently there, and dozens of huge spherical iron projectiles were piled up next to it, in addition to gunpowder.

The five gunners stood quietly next to the cannon, waiting for Hong Chengchou to give an order, and then opened fire to bombard the city wall.

"Renyu, looking at the effect of the Hongyi cannon bombarding the city, why did the cannon be so far away from the city wall?" Hong Chengchou saw that the cannon was too far away from the city wall, so he opened his mouth and asked.

"Military gate, during the actual battle, the defenders in the city also have artillery, if the defenders have a Franco, then 1000 steps away may still be hit by artillery, so it is a bit risky to stand the Hongyi cannon here." Liu Renyu explained.

"Renyu is reasonable, but there are no enemy troops on the city at this time, and since we are here to test the firmness of this city wall, I think it is better to shoot closer, so that I can also see if this city wall can also withstand the fire of Hongyi's cannons if it is close." Hong Chengchou suggested.

"In that case, it is better to come closer."

Since Hong Chengchou had spoken, Liu Renyu couldn't help but listen, so the Hongyi cannon was pushed 200 steps away from the city wall.

At this distance, Hong Chengchou nodded with satisfaction and ordered the artillerymen: "Reload, aim at a point and shoot." ”

"Yes, Junmen." When the gunners were given the order, they loaded their shells and prepared to shoot.

When the gunners were loading their own ammunition, Sun Wuxian, who had been watching the excitement on the side, looked at the huge Hongyi cannon, first swallowed a mouthful of saliva, and then asked Liu Renjie beside him with a solemn face: "Second master, do you say that our city wall can withstand the bombardment of the Hongyi cannon?" ”

"I believe in the general, this wall will definitely be able to withstand the fire of the Hongyi cannons." When Liu Renjie saw such a big cannon, he actually didn't know the bottom of his heart, but he couldn't say anything deflating at this time, so as not to fall into Liu Renyu's prestige.

"Oh!" Sun Wuzhi will be suspicious.

Besides, the gunners, who were busy for a while, shouted: "The guns have been fired." ”

Then, with a 'bang', a large cloud of dust suddenly rose on the ground around the Hongyi cannon, and everyone's hearts seemed to be hammered by a hammer, and their ears were almost deafened by the huge sound caused by the gunpowder explosion, and the muzzle of the Hongyi cannon emitted an orange-red flame, and a spherical iron projectile roared towards the city wall with huge kinetic energy.

It can be said that as soon as the Hongyi cannon fired, almost everyone was shocked by his might, and then they were all worried about the city wall opposite, and even Liu Renyu, who was originally full of confidence, was also in his throat at the moment when the cannon roared.

'Boom'.

A loud muffled sound came from the side of the city wall, and everyone followed the source of the sound to take a closer look, and found that the city wall of Liujiabao was unscathed except for a little dust that bounced up.

"Awesome, awesome." Seeing such a scene, the people on the side of Jingbian Fort cheered in unison.

Liu Renyu, who had been worried that the city wall would not be able to withstand the shelling, was secretly relieved, and Hong Chengchou was quite moved.

"It's really a bit powerful, and then shoot again." Hong Chengchou suddenly stood up from his chair and ordered loudly.

The gunners received the order and continued to fire.

Subsequently, in addition to resting for a period of time because the cannon body was overheated, the Hongyi cannon fired more than 30 rounds in a row, shooting at the same place on the city wall of Liujiabao.

It's just the effect of this shot, but it's almost meaningless, the shells of the Hongyi cannon hit the city wall of Liujiabao, not to mention the collapse of the city wall, and even a hole was not punched.

After the artillerymen finished firing the shells, Hong Chengchou ran to the city wall that had been fired by the cannons and found that the city wall was only a little indented.

Seeing that the city wall of Liujiabao was so strong, Hong Chengchou was shocked and inexplicably dumbfounded: "There is such a solid copper wall in the world, Renyu really didn't lie to me!" ”