PS: It's intentionally late, please collect and vote for 3,000 words

During breakfast, Jin Batian heard Xiaozhu say that another tobacco restaurant was silenced, and he couldn't help but look at Valme and Melia. He slept well last night, but did nothing. Valme and Melia also looked innocent, and they had no source of information, so how could they wipe out the black tobacco restaurant?

In the end, Jin Batian also thought that it might be done by imitating his superhero. Unfortunately, he forgot to leave a mark or something on the scene for the first time as a superhero. It was a pity that he didn't call out his name. Jin Batian secretly reviewed and must pay attention to leaving a handwriting on the wall next time, such as the murderer Sanpang, etc.

After breakfast, Jin Batian first came to the Ministry of Military Affairs of Peking. Today, there was a military delivery transaction that was still sent to Nanjing. It could directly arm the arms of the three reorganized divisions and some aircraft and tanks. This time, Jin Batian was directly invited to the combat research room. Song Ziwen and Sun Liren were studying the defense line on a sand table of more than ten square meters.

Seeing that Jin Batian was coming, Song Ziwen said: "You are here too. We are now studying the problem of the Three North National Defense Line. There is a group of heavy artillery clusters in the center, which are the kind with a caliber of more than 200. I think since the Nanyang military industry can make 203mm naval guns of heavy cruisers, it is not a problem to sell 203mm heavy artillery on its own."

"Of course there is no problem." Jin Batian also looked at the location of the national defense line. It turned out that the Three North National Defense Lines refer to the three provinces outside the Great Wall, Rehe, Suiyuan, Chahar, and the three provinces outside the Great Wall. Looking at the densely packed highland passes on the sand table, we have to play with Eastern Maginot. However, it is worthy of recognition.

Seeing this, Jin Batian asked: "Have the Three Norths Defense Line been built?"

Sun Liren replied: "That's not the case. Because the Zhongshan ship protected the coastal security, the government decided to build the Three North National Defense Line in one to one and a half years. This is a large project that costs tens of millions."

Jin Batian couldn't remember it, and it cost tens of millions to build a solid line of defense in these three provinces - of course, Nanjing naturally means that artificial is free, you only need to spend money to buy some materials and heavy artillery.

After studying it, Jin Batian felt that even if the Three Norths Defense Line was built, it could only delay the killing of Japanese devils. It would be difficult to block hundreds of thousands of Japanese devils by relying on this level of defense line - defense is more difficult than offense. You should know that the Kwantung Army in later generations had millions of people, and its equipment training was better than local troops. Since it was built, it was necessary to build an Oriental Maginot Line that could block million Japanese devils.

Jin Batian decided to tell that the underground mining farm was perfectly competent for this kind of fortifications - although it might reduce mining efficiency, national defense is the first priority. There are more than Japanese in the north of Peking, one enemy with bad intentions - what if the steel torrent of millions of mechanized troops of the Russians came over? The fortifications of the Three North National Defense Line can be completed and can ensure the safety of the northern part of Peking for a hundred years.

So Jin Batian said, "Since that's the case, it's better to hand over this project to our Nanyang military industry. Of course, it's untrue to say that. Seven days, I'll give me seven days to do a fortification for everyone on the Nantianmen (Nantianmen outside Beiping City). Everyone will know the level of our Nanyang military industry."

Song Ziwen naturally had no objection. It was only seven days later, so it would be almost the same as being able to dig a tunnel and lay out a machine gun fort. If the quality of the project was reasonable, Song Ziwen would not mind finding a contractor. Besides, the railway stocks built by Nanyang Investment Holdings were bought at a fair price before they were listed. Even if this relationship was not enough, it would be better to give others a chance.

Jin Batian took the warrant from the Ministry of Military Affairs and returned to the 29th Army to bring the reinforcement company to the South Tianmen. The function of the company was to prevent anyone from spying on it. The rest of the work will be completed by a newly built underground mining farm by Jin Batian. Jin Batian and Valme, as well as the men of Meria and the ** Company, used the most insidious and effective means of killing the enemy that he had thought of insidious and effective in killing the enemy on the fortification design of the South Tianmen and the Three North National Defense Line.

It was very fast for the underground mining farm to hollow out a mountain as required, although there were no particularly valuable veins here. The excess soil and stone dug out were also used by engineering robots to reinforce machine gun bunkers and hidden turrets as concrete materials.

Most of the seven days were spent on various sinister designs. Seven days passed by in a flash. On the seventh day, when Jin Batian proudly brought the minister and others to visit the fortifications here, everyone was shocked - seven days did nothing, there was no trench, and no machine gun fortress, which was considered a fortification. If it was related, don't be so arrogant, okay?

However, Sun Liren had been to the South Heaven Gate before, and always felt that this place was a little different from before and it seemed to be a little different from the South Heaven Gate on the sand table, but he was not sure.

Looking at everyone's doubts, Jin Batian said, "This Nantian Gate is still the Nantian Gate. I will take you inside and take a look, and everyone will understand."

Jin Batian and everyone walked into a four-meter-high and four-meter-wide passage from the foot of the southern mountain. Electric lights were installed on both sides of the passage. Sun Liren and Song Ziwen touched the wall of the passage casually. The wall and the road surface did not reach the level of smooth as a mirror, but it was not uncomfortable to use. The wall composition was actually rocky. Did the two of them feel shocked. In just seven days, Nanyang Military Industry dug through the mountain at the Nantianmen, and there was still time to pull the wires.

After walking through the passage of more than 100 meters, the space suddenly became clear. Everyone found a hall where several high-multiple lights shining brightly. There are several doorless passages in the hall, and the function of this passage is written on both sides of the passage, such as the rest area, the light and heavy machine rifle shooting area, the kitchen and the large dining area, the ammunition warehouse, the water room, the howitzer area, the mortar area, the toilet, the command center, etc.

Jin Batian explained: "This hall is responsible for the assembly and transportation work. We found the groundwater vein in the project and built a water room. There is no shortage of water. As long as we ensure sufficient food and ammunition, theoretically, we can stay here as long as we want."

A staff officer from the Ministry of Military Affairs asked: "Then can't you attack?"

"Good question." Jin Batian said: "There is no fortress that cannot be conquered in theory, but as an offensive party, we have to consider the price we bear. I will take you to see the three-dimensional defense map, and then take a look at his defense system on the spot and you will know."

After taking out the three-dimensional defense map, Jin Batian introduced: "This is built according to the standards of a brigade's garrison. In fact, one division can be put in and then work in shifts. In the entire defense system, we dug a total of 400 heavy machine guns, 800 light machine guns and 800 rifle free shooting ports in the mountain. It can be said that the entire shooting system is 360 degrees and 360 blind spots in all directions.

Twenty-four 20 mm dual anti-aircraft guns, thirty-six mortars and sixteen 105 howitzers were installed. These places can withstand direct bombardment of artillery below 150 mm caliber. If you are not so lucky, you will not be injured."

Another consultant looked at the picture and asked: "I can understand so many muzzles and guns on both wings on the front, but why should there be shooting ports of the same density behind them?"

"You think, the Japanese attack on the front and attack on the two wings is frustrated, will they think of making a detour? Or our forward inclination has all been lost, so we can also concentrate all personnel to stick to the reverse inclination. Control the road here through the shooting port of the reverse inclination. As long as the nail is not pulled out, the Japanese will suffer.

According to our calculations, if the troops guarding here do not escape or surrender, a B-British Brigade can block the Japanese and a A-level division. A B-B-B-B-B-B-C-Level Division can block the three Japanese and A-level divisions. Of course, this is calculated when the Japanese are not equipped with heavy artillery corps. In actual use, our suggestion is to open the shooting port bit by bit to gradually put pressure on the Japanese and retain some of their strength."

Jin Batian said this too much. Of course, many people don’t believe it. However, when they walked up, they could understand it after seeing one shooting eloquently. The thinnest place also has natural rock bodies or reinforced concrete fortifications of more than one meter. At this level, 105 howitzers attack grenades, which is the level of scratching.

The fortifications of the entire mountain are divided into six layers, and the uppermost layer is naturally anti-aircraft guns. This thing is hitting people on the plane and under the airplane, and its power and range are good. The second layer is divided into forward and inclined backwards. The forward inclined surface is sixteen 105 howitzer muzzles, and the back inclined surface is equipped with thirty-six 120 mm mortars (since you don’t need to marching, the larger the gun diameter, the better.)

The four layers below are dense machine guns. Each heavy machine gun is equipped with a light machine gun and a rifle shooting port on both sides. Each three heavy machine guns provide cover for each other, and the entire defense line is integrated (there are telephones and telephone lines). In this way, it is necessary to destroy the machine gun by approaching blasting, and it also costs enough.

At least a few staff members could not think of how to capture this fortress without the help of heavy artillery. As expected, as long as there is sufficient food and ammunition and a perseverance - if the passage is broken, it can easily block ten times or more of the enemy's attack. For such a hedgehog fortress, there seems to be no other way except to mobilize a large number of heavy artillery or siege. Moreover, the Three North National Defense Line, which is about to be launched, is not this lonely Nantianmen. At that time, several such hollowed-out mountains form hedgehog fortresses and rely on each other to block the path of entry. That is really a nightmare for the attacker.

What Jin Batian wants is this effect. If he does not have this level, how can he be considered as the Eastern Maginot Line of Defense? The fortifications in Shangganling were far inferior to those here at that time. Isn’t it possible that United ** has no tricks?

Minister Song was very satisfied with this defense system, but the problem arose again. Minister Song asked: "It's good, but our Three North National Defense Line Project only has a budget of 10 million yuan. If it is caused by this scale, it should not be enough to match heavy artillery and shells."

"Minister Song doesn't understand our Nanyang military industry. The cost of opening a mountain in secret is very low (one investment will benefit for a lifetime), otherwise this project will not be able to be done in seven days. Although 10 million is not enough, this is not building a house. This is the lifeline of building a country's national defense line. It is acceptable for our Nanyang military industry to lose a little." Of course, Jin Batian would not say that ten million is a ten million method. No matter how small the mosquito is, it is still meat, let alone a big project worth 10 million.

In this way, the Three North National Defense Line Project was started.

Minister Song sighed in his heart: It’s great to have a conscientious businessman.

Jin Batian also sighed in his heart: The lack of capital business is so good.
Chapter completed!