It is known that a ship goes through a long time when it is built at the shipyard. During this period of time, the steel plates and other iron blocks that make up the hull of the ship are gradually magnetized by the earth's magnetic field due to frequent knocking, thus becoming magnetic. When the ship is launched, it becomes a large floating magnet.

In response to this situation, a magnetic mine was developed, and once the ship sailed over the magnetic mine, its own magnetic field would trigger the mine, causing an explosion. The advantage of this type of mine is that it does not require direct contact, and when laying mines, you only need to sink the mine to the bottom and wait for the ship to hook it.

Compared with anchor mines and drifting mines, magnetic mines have better concealment, and they are simply a must-have for home travel and killing. Ever since the Feng army used mines to sink the Kirishima, the mine race between China and Japan has actually begun. War is always a battle of spear and shield, never expect a weapon to sweep the world, but need to be constantly updated and improved, as long as you go to the front of the enemy, you can take the lead.

Zhang Tinglan also knows this very well, when the Grand Fleet has not yet taken shape, mines are his trump card to contain the Japanese Combined Fleet, the big deal is that Lao Tzu is full of mines at the door of his home, I see who dares to come!

It is precisely because of this consideration that Zhang Tinglan is very concerned about the development of mines, and also put forward some opinions, the things on Jishu are just a layer of window paper, which was just not thought of in the past. Zhang Tinglan put forward the concept of magnetic mines, and after several months of research and development, the arsenal quickly came up with a finished product.

"Marshal, last time you also mentioned the water pressure mine, according to the change of water pressure when the warship passes, so as to detonate the mine, we have also done research on this, but there is one problem, that is, our water pressure fuse is very unstable. It is very easy to detonate, and it is still in Shiyan. ”

"Well, don't worry, for the time being, there are magnetic mines that are enough to make Japan suffer a little, the problem of Shandong can not be delayed any longer, our tens of thousands of troops are outside, people eat horses and chew, and the consumption is too great, after having this mine, there is a little more chance of winning."

"Great. We also have a new product, which is the burrowing bomb. Originally, it was developed for the brigade university, but we were a little slower, but fortunately, the brigade was recovered peacefully. There was no bloody battle, otherwise it would have been our fault. ”

Zhang Tinglan heard the bullet that drilled into the ground. Suddenly, my eyes lit up. Whether it is Luda or Qingdao, it is operated by the two empires before and after, and all kinds of fortifications are densely packed, and ordinary attacks have little effect at all, and they will also lose troops and lose their heads.

If there is a burrowing bomb. Then the effect will be very different, the most difficult underground fortifications will be destroyed one by one, and it will be much easier for the troops to attack.

When a normal bomb hits the ground, it explodes. Ground-penetrating bombs, on the other hand, can go several meters deep into the ground and explode more than a dozen meters. In fact, the principle is not complicated, but the warhead is made stronger, so that it can rely on strong kinetic energy to go deep into the ground. Another key is the time-delay fuse, which allows the bomb to explode only after it has gone deep underground.

"It's not too late to take it out now, there are also a large number of Japanese fortifications on the periphery of Qingdao, and it is very difficult to knock them out, with ground-penetrating bombs, you can save a lot of lives, I don't know how the production situation is now?"

"Marshal, it's a shame to say that we only made fifty pieces, in order to save costs, we used waste barrels for the projectile body, there is no problem with the strength, and it is a waste use. But warheads will need a harder alloy, and we can't produce them yet, so we can only import them from Germany. ”

"The problem of materials is not something that can be caught up in a day or two, it takes time to accumulate, and we should not be too anxious about the experimental formula."

Zhang Tinglan went around the military factory, and all kinds of production work were running at full capacity, and he was also very satisfied. With this thing, there is a strong confidence.

Back in the Shuaifu, Zhang Tinglan looked for Gu Weijun and said with a smile: "How is the negotiation in the past two days?" ”

"The Japanese have relaxed their attitude, but they are still unwilling to return Qingdao immediately, and they are trying to retain their privileges in Shandong."

"Tomorrow you will issue an ultimatum to the Japanese, give them only three days, and if you don't agree to us, you will take military action."

"Dashuai, aren't you in a hurry?"

Zhang Tinglan shook his head and said with a wry smile: "I can't wait, the Washington Conference has entered the zuihou stage, and all countries want to sign a treaty, if the Shandong issue is not ended before this, there will be a lot of trouble." ”

The Washington Conference, like the Paris Peace Conference, was a marathon meeting, with countries arguing and quarreling like vegetable markets, but the Washington Conference was dominated by the United States, Britain, and Japan, not the United States, Britain, and France.

The core of the tripartite is the issue of naval arms control, and since Japan has just been defeated in World War II and its international status has declined, the United States has proposed that the size of Japan's navy should be controlled by half that of the United States. The Japanese were adamantly opposed to this, claiming that they were threatened by China and that they must maintain a strong navy, even demanding 70 percent of the United States.

During this period, the issue of Shandong was involved, and Mihara Jihua asked Japan to retain its rights in Shandong in exchange for Japan's concessions in the navy. In short, betraying weak and small countries has become a common practice in the West.

However, I did not expect that as soon as the proposal was put forward, it was met with a strong backlash from the Feng army, and the navy, land and air forces all drove to Shandong, and China was also clamoring for war with Japan. The Americans had to put the proposal on hold for the time being, and the Washington meeting was thus deadlocked.

However, the cunning West did not stop there, and the United States put forward a new proposal, and the Japanese still had half the tonnage of the United States, but could retain the right to build two battlecruisers, which were built against the potential threat of the Mackenson.

However, the Japanese were not satisfied with this, and they tried to own 60 percent of the tonnage of the United States. In fact, the Japanese are also very shrewd in their calculations. Don't look at the large tonnage of the US Navy, but to take into account the two oceans, purely from the Pacific Ocean, the Combined Fleet will still be the most powerful Liliang.

Zhang Tinglan has learned some of the contents of the talks through his relations in the United States, and he is also happy and worried, and the joy is that almost all Shijie believes in Fengjun's deception, believing that the Mackensen will become a battleship again, and for this reason the Japanese will build two battlecruisers-for-tat, and the strategic fooling operation is almost complete.

What worries us is that once the United States, Britain, and Japan implement the agreement, the Shandong issue will still be unresolved, and it is not clear that the United States and Britain will plot against the Fengjun army behind Japan's back, so they must reach an agreement before the end of the meeting.

When Gu Weijun heard this, he also nodded hurriedly: "What the marshal said is, but what if the Japanese still don't agree?" ”

"Then go to war!"

Zhang Tinglan said unceremoniously that in this kind of international competition, the most taboo thing is to be anticlimactic and make the mistake of escapism. If there is no way out, then there is no way out.

After Gu Weijun left, Zhang Tinglan immediately called Shen Honglie and Sun Anhu over, introduced the situation to them, and then said: "Once a war with Japan starts, it is still a principle, and it must be resolved quickly and without delay. The navy immediately dispatched a submarine unit to carry out mine-laying operations in Jiaozhou Bay to cut off the Japanese army's contact with the outside world. ”

"Marshal, I think it is best not only to lay mines in Jiaozhou Bay, but also to take offensive minelaying measures, that is, to lay mines at the doorstep of the Japanese."

When Zhang Tinglan heard this, she couldn't help but ask, "Are you sure of this?" ”

"No problem, the range of the Seawolf-class submarine is sufficient, and we have a new type of mine, which will definitely make the Japanese suffer a big loss."

"Well, let's arrange for six Seawolf-class submarines to lay mines against Japanese ports, while the rest of the submarines are to blockade Jiaozhou Bay."

"Yes!"

Zhang Tinglan looked at Sun Anhu again: "Let the first and fifth divisions mobilize, immediately stationed in Shanhaiguan, and enter the customs at any time for reinforcements. ”

Shen Honglie and Sun Anhu hurriedly went to arrange, and the Feng army increased its troops again, pouring another barrel of oil on the firewood that was burning vigorously, and all parties hung their hearts, and it seemed that the battle was really inevitable.

The early morning sun sprinkled all over Jinan again, the Japanese soldiers dragged their tired bodies, got up again, last night the Feng army carried out three exercises in a row, the most annoying thing is that a group of singers were invited, singing Shandong Bangzi, after singing and then changed to Lu opera, has been tossing for a night.

Up to now, the high-pitched singing voice of the Shandong Han is still echoing in the ears of these Japanese soldiers, which makes these Japanese people extremely irritable. Hit and don't let you fight, go and don't let go. Isn't that for them to suffer to sin!

These days, all the Japanese soldiers have lost more than a dozen pounds, and the already short Japanese seem even shorter, with deep sunken eyes, blue and black eye bags, stubble on their faces, and messy hair on their heads, like rotten grass, these people don't look like soldiers at all, but like a group of beggars!

It's breakfast time again, and everyone is listlessly nibbling on their nests and drinking clear soup that can illuminate people's figures. At this moment, suddenly several planes appeared in the air again, which was supposed to be on anti-aircraft alert, but the Japanese were used to this harassment, so they simply didn't care about anything, and were still pointing fingers.

After a few turns, the plane suddenly dropped a large number of paper bullets and fell to the ground, and some curious Japanese people thought that they were geisha pictures and were going to secretly hide them.

However, as soon as they saw the contents, they were immediately dumbfounded, and it turned out to be a newspaper of the Asahi Shimbun, with the news on the front page that the Sino-Japanese peace talks had been successful and that the Japanese troops had withdrawn from Shandong.

As soon as they saw this thing, the Japanese were immediately stupid, is it really over, and the nightmare days are finally over?

This is a Japanese newspaper, you can't be wrong, but when I saw this, two sentences poured out from the hearts of the Japanese: "I lost again." "It's finally over!"

Not only in the city, but even the Japanese soldiers in the positions outside the city saw this newspaper, and they walked out of the trenches one after another, and the damned confrontation was finally over. But at this moment, the command of the Japanese army let out a terrible curse: "The despicable Shina people dare to deceive the samurai of Great Japan!" (To be continued......)