Historically, the Manhattan Project has been so highly secretive that even Harry Truman, as vice president, only learned of such a huge plan after he took over the presidency, and it had already borne fruit.

As the theoretical arguments came to fruition, the emperor, the prime minister, the governor, and a few others immediately realized the crucial nature of the matter.

So one morning in late June, several key people gathered for an unusually confidential meeting.

There are no rare air conditioners here, only whirring electric fans.

The three big bulls present were Qian Yuankai, Zhao Zhansheng, and Yuan Xiantong - two physicists and a mathematician.

"In other words, there are two ways to go, either simple and easy but inefficient and wasteful, and conversely, difficult but efficient?" Gao Qingkui asked.

"That's right, let's call this method the 'collision method' for the time being." Qian Yuankai explained very clearly and simply, "The theoretical calculation requires a high-purity uranium block with a radius of nine centimeters, that is, 58 kilograms. There is no difficulty in terms of design, as long as the raw materials are gathered. ”

"Raw material acquisition... How easy is it? ”

"Extremely difficult, Your Excellency, there are only a slight differences between uranium-235 and uranium-238 at the microscopic level, and there is a way to separate them, but it is very expensive."

There is no point in explaining the details and principles to the leader, and Qian Yuankai was able to persuade the Ministry of Industry to help ask for funds, which is enough to prove that his wisdom is not limited to science.

Wu Weihuan also asked: "What about the other way?" Don't have to spend so much effort to get the raw materials? ”

"Yes, the plutonium required by the 'detonation method' is easier to prepare, but it cannot be detonated in a simple way like uranium."

"Why is that?"

"We found that the plutonium raw material contains a little plutonium-240 impurity, although it does not affect the whole raw material, but it will spontaneously release high-energy neutrons, resulting in many negative effects, and may even cause self-explosion."

The two sides talked word by word, and the topic progressed rapidly.

Zhou Changfeng was also on the scene, and it had been mixed up to such a point in just a few years, although it took advantage of the light of the innate advantage of the traverser, but if it was insisted on saying that there was not even a little bit of pride, it would be a lie.

He remembered that the Manhattan Project cost $2 billion, but 90 percent of the cost was spent on mining, refining, and enriching raw materials, and it didn't cost much money to research on paper and process finished raw materials into weapons.

99% of uranium ore mined in nature is U-238, and less than 1% is U-235, and the separation of the two isotopes is quite difficult and can only be separated by gas diffusion and gas centrifugation.

However, if a dedicated heavy water reactor is built, the abundant U-238 can be transformed into the required Pu-239 through a series of complex physical reactions under neutron bombardment.

U-238 becomes U-239 with one more neutron; U-239 can then decay into Np-239; Finally, one more decay turns into the required Pu-239.

After thinking about it carefully, Gao Qingkui muttered: "Your Majesty, the minister thinks that the pressure explosion method is better. It's just the design that's hard, the raw materials are easy to come by, and it's better in the long run. ”

"How can you do it without leaving a back hand? If the design is wrong and does not succeed, then how much time has been delayed in vain, and it will be too late to regret it at that time. "This time it's really not deliberately against the tune, but Wu Weihuan thinks that the prime minister's idea is too optimistic.

"The collision method requires a lot of raw materials, and purification is extremely cumbersome, which is not only expensive, but also very expensive. Wei Guogong, if you don't belong to your family, you don't know how difficult it is to run Daming, and the money is not just printed. ”

Compared with the Metropolitan Governor and the Prime Minister, Zhu Lingjing systematically studied physics, and after learning that the principle of nuclear fission can be applied to weapons, she took the time to make up for this knowledge.

She said in a very affirmative tone: "There is no point in choosing this matter, and what you save today will be made up for the day after tomorrow." If the two are parallel, you don't have to think about the cost. ”

At this time, Yuan Xiantong suddenly spoke, and this middle-aged mathematician spoke with an obvious Sichuan-Chongqing accent.

"Your Majesty, as far as the principle of the burst pressure method is concerned, the mathematical model used to design it contains partial differential equations, which can be recursively obtained to obtain an approximate solution. If you do not pursue in-depth optimization, only take successful detonation as the minimum requirement, you can be sure of it. ”

His words were tempting - the plutonium needed for the detonation method (implosion) could be artificially made anyway, and it was relatively easy to obtain, and even if the first time was not satisfactory, it could be quickly prepared for a second time.

Solve the problem first, and then solve the good and bad!

Who would have known that this secret meeting, which lasted more than two hours, decided an important node in human history.

After weighing the pros and cons, the top few people in the Ming Dynasty finally agreed to the strategy after that - to take the research and development route of the explosion pressure method, and the priority and secrecy level were listed as the highest level ever.

At the last moment, Zhou Changfeng, who had been silently watching, suddenly reminded.

"Your Majesty, should we give this plan a code name?"

Everyone was about to leave, and they all stopped when they heard the words.

This kind of thing, wouldn't it be nice to have a random number? The more abstract it is, the harder it is to notice the abnormality.

"Oh, "the three-legged black is the sun", then use the golden crow to refer to it."

"Yes."

Zhu Lingjing just said it casually, but Zhou Changfeng suddenly came to inspiration and added for her: "In order to confuse the public, why don't you go farther?" Golden Crow... Special crop research and development. ”

"That's good." Gao Qingkui stroked his beard and smiled.

After the secret meeting was over, it was almost time for lunch, and everyone dispersed.

At the thought that there might be some magical conversations in the future, Zhou Changfeng couldn't help but laugh.

Q: What do you do, sir?

Answer: Those who farm the land, plant the sun.

The corners of his mouth involuntarily rose slightly, and he was about to go home for a beautiful meal and enjoy Xia Xiaoshi's growing cooking skills during this time, but he was suddenly stopped.

"Zhou Kexing."

"Huh? Your Majesty? ”

Zhou Changfeng, who didn't know why, turned around and saw the emperor who was walking this way.

When they got closer, Zhu Lingjing, who was smiling, sneered: "So anxious? Hurry back to see your precious daughter? ”

"Uh... There are some reasons, but the main reason is that I want to try my wife's craft. ”

"Oh, speaking of which, why is your daughter not famous?"

Ah, this has just decided a major event in China, and even in the history of mankind, why did this woman suddenly get involved with Jian Jian?

Zhou Changfeng muttered, "This... It's a long story, wasn't it in a hurry to go out at that time? I didn't think about the name, so I dragged it off, and just waited for the next year to be a year old. ”

"You don't care about this, you seem to be a father, but you don't actually pay attention to family affairs." Zhu Lingjing stretched out her index finger and shook it, smiling slightly, "Otherwise, if I give me a name, it will save us General Zhou the trouble of thinking of a name." ”

Hey, this woman must have a heart.

"This ......" Zhou Changfeng was embarrassed, and hesitated: "Your Majesty, the minister still has some time at this time, and he will get up when he goes back, and he will get up when he goes back." ”

"Really? In all fairness, just in terms of naming, Zhou Kexing, you may not be as good as me. ”

"A name for a child should include the wishes of the parents......

Every time she sees someone Zhou eating deflated, Zhu Lingjing is very happy, I didn't think about why before, but now the reason is probably because it is particularly interesting to ridicule someone like Zhou with a distinct temperament.

"That's it, don't make fun of you, go ahead, finish the uncooked Russian incident in time for the afternoon."

"Yes."

To be honest, Zhou Changfeng is also used to such a daily routine, in the past, Zhu Lingjing would always say something unpleasant, but now it is much better, but it has changed to ridicule from time to time.

It's not a good job.

After returning home, he stared at his daughter and complained to his wife about the past.

I don't know that the latter pouted and said: "I think what Your Majesty said is very true, Zhou Kexing, your mind is all on official affairs, and you don't name Jian Jian until now." ”

Zhou Changfeng was silent for a while, and suddenly sighed helplessly: "Xiaoshi, I feel that what the emperor said seems to really make sense." You know, the names I came up with before were really not ......."

"Hmph, then you still disliked my name at the time, so why don't you just listen to Your Majesty's let her name one, see if you dare to dislike it!"

"Ahem, it turns out that Xiaoshi, you are still more educated than your husband in this regard."

Later, the dishes are served, and the two sit opposite each other.

In fact, the reason for the disagreement is the difference between culture and the times, and today's girls' names are often Zening, Suyi, Guoqin, Fengshu, etc., and even Weiying, Zhaoming, Zhimin and the like.

Compared with the names of later girls, the words are even more incompatible. Zhou Changfeng naturally felt weird, he subjectively didn't like these neutral names.

Seeing that he was still thinking about the name at the dinner table, Xia Xiaoshi said casually: "Aren't Ning Yu, Huailin, and Shujun all good?" ”

After thinking about it, Zhou Changfeng simply picked the one that sounded the most satisfying to him, he turned his chopsticks and stared at his wife in front of him, "Then... Wai Lin. ”

"Yes, Lin, Meiyu is also." Xia Xiaoshi said contentedly: "Sir, tomorrow we will send someone to the county government to ensure that the file is kept." ”

So, a few months have passed since her birth, and Jian Jian has received her name.

Although Zhou Changfeng felt a little sloppy, he felt that he might not be able to come up with a good one after thinking about it in the future, so he was relieved.

"If I am busy for a few more days, it is estimated that there will be fewer things in the future, but it will only be less work for the edict."

"Why do you have to be idle after that?"

"Because the big event has been decided, now all countries have to slow down and adjust their strategies, and it is unlikely that there will be a new large-scale battle for the time being." Zhou Changfeng said while picking up vegetables: "But there will be chaos in the north for a while." ”

"I don't know which side will win after the Russians compete with each other." Xia Xiaoshi muttered softly.

"The Germans will not let go of the abundant place, and the matter of the volunteer army is not published in the newspapers. This is just the beginning. ”

"Oh, sir, is this just an introduction? That means that in the future, there will be foreign troops constantly entering and interfering, and since the Germans are now powerful, they will definitely fall to their side in the end. ”

"That's right, there's a reward." Zhou Changfeng smiled and picked up the fat and tender meat on the belly of the braised sea bass, "Open your mouth." ”

After this period of information feedback and analysis, the purpose of the Red Eagle Legion all the way into Russia has been very clear.

By the time of the day, they had purged other armed forces in the vicinity of St. Petersburg, and the spearhead was directed at St. Petersburg. About 20,000 ▇▇▇ troops (red) are cooperating with them.

On the long front from Smolensk to Orel, the duel between the ▇▇▇ troops (red) and the National Republican Army (blue) has not yet been decided.

It is amazing that the two sides have turned the duel into a replica of the European trench warfare, digging trenches and defending them, position to position, trench to trench.

The Metropolitan Governor's Office believed that this was mainly due to the fact that the automobile industry in Tsarist Russia was not good in the first place, and the civil strife completely disrupted the vehicle manufacturing industry, which needed the support of a complete system, so the production of regular tanks plummeted.

In the beginning, the two sides also launched several beautiful in-depth assaults, and a tank brigade of the Nationalist Republican Army even drove more than 300 kilometers in two days and one night.

However, the vast land and poor transportation dragged down the tank forces on both sides, and the breakthrough was quickly filled by an endless mass of infantry, while the tanks were abandoned one after another due to damage and malfunction.

In this way, as the breakthrough force was greatly reduced, both sides were reluctant to put the remaining tanks into the battle at will, the battle line tended to be stable, and the combat mode gradually changed to digging trenches and defending positions.

The Germans did not want to act as an awl to break the deadlock, believing that the confrontation would be broken in a few months due to an imbalance of power.

Berlin has approved military assistance to the ▇▇▇ troops (red), in addition to radios, artillery, machine guns, ammunition and other equipment, 240 tanks and some spare parts substitutes.

The Czech Republic and Slovakia have a number of transmissions used in Vickers tanks, and the Skoda six-cylinder gasoline engine is roughly adapted to the T-26, and it is expected that dozens of T-26s with good bodies but some equipment can be assembled through these substitutes.

According to the instructions, the Red Eagle Legion needed to take St. Petersburg as soon as possible. If possible, an attempt should be made to capture the tsar himself.

After strangling the most conservative and reactionary group of the imperial Russian aristocracy on Russian soil, the Red Eagle Legion had to cross thousands of kilometers by rail and move to the Caucasus.

At that time, the 4th Mountain Division will also come from China to join the Red Eagle Legion to support them in their joint seizure of the strategic Baku oil fields.

Although the modernization of petroleum technology began in 1877, Baku already had wells of industrial exploitation in 1873.

Due to the shallow depth of oil resources buried on the west coast of the Caspian Sea, in some places even more than 10 meters can be excavated to find signs of oil, and the difficulty of exploitation is low. Even before the European War, Baku was the world's most productive oil field at the time – more than 200 refineries were active in the suburbs, and the entire city lived around oil.

At that time, the sea was drifting, the air was filled, and the ground was covered with black substances from oil extraction and refining, so Baku was also known as the Black City.

Today, with an annual production capacity of 28 million tons, the Germans are bound to hold this source of power in their hands.

(End of chapter)