Three days passed in the blink of an eye.

It's June 28th.

There was no large-scale attack on the defense line of Xia Zhen in the past three days, and Jiannu had been busy building the fort, because the fort built on the first day was found to be not high enough.

On the first day of Gao, the height of the fort was also increased to three zhang.

Then when the height of the fort was increased to three zhang the next day, it was found that it was still not high enough, so it had to be given two more days to high, and the height of the fort was increased again, directly to five zhang.

Gaodi's army was busy building forts, and Jiannu was not idle.

There were no large-scale attacks, but no small-scale harassment was stopped.

Sometimes during the day, sometimes at night, Jiannu would suddenly come with a wave of surprise attacks.

However, whether it is day or night, Jiannu can't bargain at all.

This morning's surprise attack was particularly miserable, Geng Jimao took a Niu Lu of the Zhenghuang Banner Han Army, under the cover of the Fan Lang machine gun and the Eight Banners, and once again successfully broke into a platform in front of him, and then when Geng Jimao was about to lead his troops to continue to attack the next platform, countless lead suddenly poured down like hailstones.

It was really hail, and the whole platform, along with the surrounding encirclement of trenches, was completely covered with lead.

In the first few raids, when it was attacked by the Ming army's artillery fire, it was only a small area, and the range was at most a dozen paces, but this morning this wave was nearly a hundred paces.

Within a hundred steps, you won't find a place to hide.

When Geng Jimao was carried back by his coat, the whole person was stunned.

Zu Zerun pinched Geng Jimao's people for a long time before he came back to his soul.

Bai Yintu and Ao Bai called Wang Aoyong, a dog traitor, to analyze it for a long time, and finally came to the conclusion that the Ming army must have concentrated the tiger squat cannons from other directions to the front.

"Two adults, this is the case."

"With so many lead bullets, it takes more than 20 tiger squat cannons, to say the least."

"There are so many cannons in one gun, how many cannons do you need in a thousand? It is impossible for the Ming army to have so many tiger squat artillery. ”

Wang Aoyong swore and said: "The Ming army must have concentrated all the tiger squat artillery in other directions to the front, so it will definitely cause the garrison of the other directions to be empty, so at this time, attacking from other directions will definitely be able to achieve miraculous results, and there may be a chance to break into the core of the Ming army's defense line in one fell swoop." ”

The worship picture and the worship are all slightly moving.

Wang Aoyong's analysis of this dog is quite reasonable.

But at this moment, a guard came in and reported: "My lord, there is an urgent delivery from Beijing. ”

Since Dolgon has decided to negotiate peace with Da Ming, he naturally will not let Baiyintu and them fight again.

Therefore, at the same time as sending a mission with Zuo Maotai as the envoy, he also sent an urgent delivery to Bai Yintu.

"Beijing Express?" Bai Yintu frowned when he heard this, took the fire paint letter from the guard's hand, and Ao Bai next to him immediately came over, I don't know why, both of them have a sense of foreboding.

Dolgon, this guy can't be some kind of moth, right?

As a result, after reading the letter, both of them had crooked noses.

"What are you doing? How did the Qing Dynasty and the Southern Ming Dynasty become brothers? ”

"Do you want to give Shandong to Nanming? So weren't our two battles in Shandong in vain? And the hundreds of our warriors with yellow flags didn't die in vain? How does this work? ”

"Lord Baiyintu, this is not going to work."

After reading the letter, Ao Bai was so angry that he wanted to jump up.

Bai Yintu also looked gloomy and didn't speak for a long time.

In fact, during this period of time after entering the customs, Dolgon has been enveloping Baiyintu through Gong Adai, and it has not been a day or two that Dolgon wants to add sand to the yellow flag and the yellow flag.

Truth be told, Baiyintu is also very optimistic about Dorgon.

Zilharang is compared to Dolgon, and he is a coward.

As for the little emperor of Shunzhi, he is too young.

Bai Yintu felt that it would be difficult for Shunzhi to hold the throne.

When Dolgon took power and completed the integration of the Eight Banners, the usurpation of the throne was a sure result, after all, the Ming Dynasty had a precedent for his uncle to usurp the throne of his nephew.

Therefore, it is undoubtedly a wise choice to secretly turn to Dolgon.

However, before Dolgon has taken over the power, he must not show it too obviously, otherwise it is easy to attract the disgust of Ao Bai and other generals with yellow flags.

Thinking of this, Bai Yintu immediately made a decision.

"Aobai, you're right, this won't work!"

"We have killed more than 300 warriors in Shandong with the yellow flag, including 14 Bayala! Since the old Khan raised his troops, the yellow flag has not suffered such a big loss. ”

"If this revenge is not avenged, my worship map will be in vain as a yellow flag to solidify the mountain."

"You worship in vain as the Yellow Flag Laya Zhangjing! Our yellow flag will also become a laughing stock! I can't look up in front of people for the rest of my life. ”

Baiyintu spoke impassionedly.

Ao Bai also listened enthusiastically.

"Lord Baiyintu, you said that I am in the heart of worship."

Ao Bai said: "In the afternoon, we will attack in a different direction, I will take a Yellow Flag warrior with Niu Lu and two Niu Lu of the Yellow Flag Han Army, and finally fight again!" ”

"No!" Bai Yintu waved his hand.

"One Niu Lu is not enough, you take a warrior from Jiala."

"The eight Niu Lu of the Han Army Banner and all of Gaodi's surrender army."

"With our troops, it is impossible to attack from hundreds of platforms on the periphery at the same time, but it is still possible to attack from more than a dozen platforms at the same time! This time, we must defeat the Ming army! ”

"Huh!" Ao Bai responded violently.

……

Chongzhen has been busy for three whole days.

He has been doing one thing for the past three days: determining the shooting parameters.

The efficiency can only be said to be unsatisfactory, and more than 50 guns have been calibrated.

After all, there is only one person, and calibrating seventeen or eighteen guns a day is already the limit, and it takes no physical effort to determine the matter of shooting Zhuyuan, but it takes time.

This will bring Chongzhen to a platform again.

And moved one of the Tiger Squat Cannon to the center of the platform.

This tiger squat cannon weighs at least sixty catties, which is heavier than the tiger squat cannon of other platforms.

Speaking of this, Chongzhen was speechless, the Ming Dynasty's War Bureau and the Weapons Bureau were really crotched, and even Daqin's weapons manufacturing had formed a certain level of assembly line manufacturing, but in the Ming Dynasty, it was more and more mixed up, and the Ming Dynasty never had such a thing as assembly line production, and there was no concept of standardization.

Even if it's the same batch of tiger squat cannons just cast by the same craftsman, you can't find the same.

Because the sand molds are all turned over and cast, after casting a cannon, a new sand mold will be made, so there are no two tiger squat cannons with the same size in the Ming Dynasty.

In fact, not to mention the tiger squat cannon, even the bird gun has not yet formed a standardized production.

The outer diameter of the barrel is not necessarily the same for each bird's gun, and it is very troublesome to match the bird's gun with a barrel bayonet, because each bird gun must be equipped with a special bayonet, which is very troublesome.

It can't be standardized, not only is the efficiency low, the production speed can't go up, and the cost can't go down, and the finance of the Ming Dynasty will also be dragged down, so after resisting this wave of attacks by the serpents, he will return to Nanjing immediately, and the first thing after returning to Nanjing is naturally to make money, and the second thing to do after getting money is to reorganize the Ordnance and Ordnance Bureau.

It is also said that the Tiger Squat Cannon, since the technical parameters are almost identical, this greatly increases the workload of measuring the parameters, because the two Tiger Squat Cannons of the same platform have to be measured separately.

For example, the two guns of this gun platform are not only different in weight and caliber, but even the shape and inclination of the two tiger claws are different, and there is no correlation at all.

But these are the two tiger squat guns, and the parameters must also be determined.

Moreover, it is necessary to determine the calibrated firing parameters of 2 on the left and right sides, 4 in the front row, and 3 in the front row, a total of 11 guns, so that when any of these 11 guns within 300 steps are attacked, the two tiger squat guns of this platform can support the large error of artillery fire according to the pre-calibrated shooting parameters.

By modern standards, the Tiger Squat Cannon simply did not have the conditions for calibrated firing.

Because the error rate of the Tiger Squat Cannon is too large, the same amount of charge is also loaded with the same projectile, but the impact point of the two shots can be deflected by 30 paces, close to 50 meters!

You must know that the maximum firing range of the Tiger Squat Cannon is only 500 meters.

But what is the concept that the impact point can be deflected by 50 meters?

By modern standards, such artillery could not even go to war.

But fortunately, Chongzhen's requirements are not high, and the error of thirty steps is a bit bigger, but it can also be used.

Because more than a dozen guns and more than 20 tiger squat guns fired at one gun platform at the same time from different directions, this defect of the tiger squat cannon turned into an advantage, and instead formed a large area of full barrage coverage without dead ends!

"Get to work." Chongzhen roughly adjusted the shooting angle, and said to Zhu Cihong and Zhu Cijiong, "It's still the old rule, Hong'er, you go to the platform on the left, and Jiong'er, you go to the right." ”

Following Chongzhen's three-day test of shooting parameters, the karmic abilities of Zhu Cihong and Zhu Cijiong's little brothers have also improved by leaps and bounds, and they can already take on the heavy responsibility of reporting targets to Chongzhen alone.

After Chongzhen finished firing, the little brothers first measured the error of the impact point and then reported it to Chongzhen.

The little brothers answered, and when they were about to leave, a bang suddenly sounded from a gun platform in front of them.

"It's a trumpet!" Zhu Cihong frowned and said, "It is estimated that another Jiannu came to attack and disturb him." ”

"These slaves are disgusting, like a swarm of flies." Zhu Cijiong said, "It's really infuriating to shoot and come back, and you can't shoot it to death." ”

Before the words of the little brothers fell, there were two more booms.

"Three shots!" Zhu Cihong's face changed in an instant.

When the cannon sounded three times, it was not a small-scale attack, but a large-scale attack!

"Let's go!" Chongzhen didn't say a word, turned around and ran in the direction of the canal wharf in Xia Town.

The entire defense line has been designed a long time ago, but the actual effect is still unverified, and now Jiannu has finally launched a large-scale attack, and the time has come to test the effectiveness of the defense line.

As the architect of the entire Xiazhen defense line, what Chongzhen needed to do now was to observe the entire battle process from the Wangdou of the naval warship, so as to find out the flaws.