The helicopter that Zhang Yunfei was riding landed steadily on the apron of the base pángbiān. As soon as the plane stopped, a colonel officer walked over quickly and opened the cabin door for Zhang Yunfei. Zhang Yunfei walked down steadily.

"Stay at attention! Salute!!!"

With a shout, all the officers and soldiers at the small helicopter airport saluted Zhang Yunfei together. Everyone's eyes were full of respect and excitement.

Zhang Yunfei's reputation and prestige are not only high among the general public, but also reaching a very high level in the army. Today, everyone can see Zhang Yunfei at close range with their own eyes. These officers and soldiers are naturally excited and respectful. "Please search Piaotianwen, the novel is better and faster! .

Zhang Yunfei returned a military salute and said with great enthusiasm: "Thank you for your hard work, comrades!"

Zhang Yunfei just looked around and looked around. The conditions here are still relatively difficult. This place is an unmanned land and is not suitable for human living. However, in order to keep it confidential and safe, the base was placed here.

Accompanied by several officers and the base head, Zhang Yunfei walked towards the base not far away. The staff around him introduced that the colonel officer just now was the military leader here, and the base head was Zhong, a middle-aged man with a surname of 40 or 50 years old.

"Please please, Chief!" The person in charge of the base took Zhang Yunfei and others into a surface building, and along the passage, he went down to a underground dozens of meters deep.

Along the way, Zhang Yunfei watched several laboratories and shook hands with many excited scientific researchers. The head of the base kept reporting the entire situation to Zhang Yunfei.

Although Zhang Yunfei has been here in person, Zhang Yunfei has read some information and documents about this base, and even some important documents were issued by Zhang Yunfei himself. However, after coming here to watch it in person, Zhang Yunfei was secretly shocked. The situation here is better than the one reported on the documents and documents, and the scale is also very large.

The construction here took a lot of manpower and material resources at that time. Zhang Yunfei was still in the process. Unexpectedly, it has only been more than two years since the start of construction.

The head of the base saw Zhang Yunfei and took the opportunity to report: "Chief, since Oppenheimer came a few months ago, many problems have been solved. The scientific research work is progressing very quickly."

Zhang Yunfei nodded and thought to himself, Oppenheimer is indeed a great man, Ziji's business has made a lot of money, and a few warships have replaced such an outstanding talent.

"Let's go! Let's see Mr. Oppenheimer."

Originally, Oppenheimer was coming to greet Zhang Yunfei in person. Although he was a Jew, Oppenheimer was also called "Good of Knowing the Meet".

After coming here, Oppenheimer of course, Zhang Yunfei attached great importance to the atomic bomb. Not only did he invest a lot of manpower and material resources, he also provided a right-hand assistant to Ziji. More importantly, Ziji has requirements, and the central government will satisfy it one by one every time.

After working here for a few months, Oppenheimer is now full of energy and full of energy. He is completely different from his condition when he came to China. Oppenheimer wanted to thank Zhang Yunfei in person and create such good conditions for Ziji's scientific research.

At the beginning, even in the United States, the United States attached great importance to Ziji far to this level. Ziji was a newcomer and had just arrived in China. Not only did Zhang Yunfei personally meet him, but he also entrusted an important task to appoint Ziji as the chief scientist of this scientific research base.

Oppenheimer wanted to greet Zhang Yunfei in person, but Zhang Yunfei was afraid of affecting Oppenheimer's scientific research work, so Zhang Yunfei still asked Oppenheimer to interrupt his scientific research work to welcome Ziji.

When Zhang Yunfei saw Oppenheimer's Shihou, Oppenheimer was wearing a white coat and explaining Shime to a group of people in a spacious laboratory.

These people, including Chinese and blonde foreigners, were listening carefully to Oppenheimer's explanations around Oppenheimer.

Oppenheimer, who was explaining, interrupted the explanation when he saw Zhang Yunfei and his party coming, and walked over excitedly. Although Oppenheimer and Zhang Yunfei had only met once, Oppenheimer was deeply impressed by Zhang Yunfei and had thought of Zhang Yunfei many times.

When she walked to Zhang Yunfei, Oppenheimer said excitedly: "Oh! Dear Chairman Zhang, it is my honor to see you again. I am really grateful to God."

Oppenheimer spoke a lot in English in one breath, and his gratitude was beyond words.

Zhang Yunfei naturally felt Oppenheimer's gratitude. Seeing Oppenheimer's words, he didn't wait for the translation of pángbiān, Zhang Yunfei smiled and took the initiative to extend his hand.

Oppenheimer was flattered and excitedly stretched out his hands to hold Zhang Yunfei's hand tightly. Zhang Yunfei smiled and said, "Mr. Oppenheimer, I'm still used to coming here. Ruguo has requirements and difficulties, even if I tell me."

The staff at pángbiān were slightly surprised to see Zhang Yunfei's fluent English and thought to himself that Chairman Zhang was also proficient in English, which was really unexpected!

Most of these personnel are not Zhang Yunfei's entourage staff. Zhang Yunfei's entourage staff feels a lot about Zhang Yunfei's fluent English. People familiar with Zhang Yunfei are also familiar with Zhang Yunfei, and Chairman Zhang can speak fluent Japanese.

Ruguo was Zhang Yunfei's old subordinate, and everyone also said that in the early days of the War of Resistance Against Japan, Chairman Zhang went deep into the enemy's backbone with his fluent Japanese language and killed many little ghosts.

Zhang Yunfei and Oppenheimer had a conversation. How long did it take? Oppenheimer talked about Ziji's current research work. When it comes to Ziji's old career, Oppenheimer spoke in a constant manner, while Zhang Yunfei listened patiently and carefully.

Although Zhang Yunfei has a much more detailed understanding of the atomic bomb than ordinary people, in this era, there are still a few people who can atomic bombs, except for some professional scientific researchers and some nuclear physics workers, Zhang Yunfei still listened patiently.

Zhang Yunfei listened to Oppenheimer's explanation and gained a detailed understanding of the atomic bomb and its development work.

Atomic bombs are one of the nuclear weapons. They are weapons that use the photothermal radiation, shock waves and inductive radioactivity of nuclear reactions to cause lethal and destructive effects, as well as large-scale radioactive pollution, and prevent the opponent's military operations to achieve strategic goals.

Before introducing the structural principles of the atomic bomb, Oppenheimer first introduced Zhang Yunfei the charge of the atomic bomb. Currently, the charge of the atomic bomb mainly uses uranium 235. At present, it can be obtained in large quantities and can be used as atomic bomb charges. Only fission substances such as uranium 235 are limited to the fission substances such as uranium 235.

The scientific research work of the atomic bomb is mainly about how to obtain high concentration of uranium 235. Before Oppenheimer came, the work was difficult and progressed slowly. After Oppenheimer came, the work made breakthrough progress.

After Oppenheimer came, in order to obtain the high-concentration uranium 235 needed to make the atomic bomb, mǎshàng adopted the "gas diffusion method". After many tests and research, it finally achieved success. At present, yijing has obtained a lot of high-concentration uranium 235.

With nuclear charges, as long as their volume or mass exceeds a certain critical value, an atomic bomb can be exploded. However, there is also a problem that causes atomic bombs here, that is, how to do it: when it does not need to explode, it does not explode; when it needs to explode, it can explode immediately.

This work is currently the research topic of Oppenheimer and his scientific research team. However, now that Yijing is in the forefront, Oppenheimer is preparing to control the critical mass or critical dimensions to achieve it.

Oppenheimer also has a general solution to how to control critical mass or critical size. Oppenheimer is preparing to adopt the so-called gun-type structure.

In later generations, the first atomic bomb was adopted in this structure. For example, the atomic bomb dropped by the United States on Hiroshima, Japan (codenamed "Little Boy") used a gun-type structure. The bullet weighs about 4,100 kilograms, is about 71 cm in diameter and is about 305 cm in length. The nuclear charge is uranium 235, and the explosion power is about 14,000 tons of Temperature equivalent.

In principle, the simplest atomic bomb adopts the so-called gun-type structure. Two uranium blocks that are smaller than the critical mass are separated by a certain distance and will not cause an explosion. When they are combined, they are greater than the critical mass and an explosion occurs immediately.

Zhang Yunfei took half a care and patiently listened to Oppenheimer's report. After the report, Oppenheimer was furious and looked very impressed with Ziji's grades.

After listening to the report, Zhang Yunfei was naturally very happy. Unexpectedly, the progress of the research progress of the atomic bomb was so fast after Oppenheimer came. Yijing was studying how to control the explosion. The purification of uranium 235 was solved, and purified a lot of high-concentration uranium 235.

Zhang Yunfei was also slightly excited after making such great progress. He asked, "Dear Mr. Oppenheimer, I am very happy that you have achieved such great results. Can your first atomic bomb be developed?"

After hearing Zhang Yunfei's words, Oppenheimer said proudly: "Dear Chairman Zhang, first of all, I would like to thank you for providing such good conditions for our research. We will work hard to repay your kindness. We strive to develop the first atomic bomb within one year."

"Okay! That's great!" Zhang Yunfei was naturally very happy to hear that he would develop the first atomic bomb within a year.

Zhang Yunfei thought, when the first atomic bomb was dropped on the battlefield, what would the United States think, and exchanged such a genius scientist to Ziji. It is estimated that the United States has the mood to hit the wall.

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