Hearing Liu Xuandu explain his intentions like this, the person in charge was flattered, stretched out his right hand, wiped it on his dirty clothes, wanted to make his hand look cleaner, and then stretched out to Liu Xuan.

"Hello, my name is Mu Guang, welcome to join us." The nearly fifty-year-old man said to Liu Xuan with unconcealed joy on his face.

"It's a pleasure to work with." Liu Xuan also stretched out his hand and shook hands with the other party, and in the future history, this historic handshake will definitely go down in history forever.

After a few simple conversations, Liu Xuan followed Mu Guang and everyone in the research room to meet each other, Liu Xuan was almost surrounded and left the laboratory, Liu Xuan did not expect that after a hundred years, he would have such a high reputation.

Walking out of the laboratory, he tidied up his messy clothes under Li Ping's funny eyes, and a tingling sensation came from his body, Liu Xuan asked Li Ping suspiciously.

"This dress still has a paralyzing function?"

Li Ping touched her clothes suspiciously, and laughed directly, Liu Xuan next to her looked confused, what happened?

"There's a leak, let's find a primitive dress to wear, this kind of high-tech clothes really can't adapt to it." After Li Ping finished laughing, she pulled Liu Xuan and walked towards the clothes store in the underground city.

An hour later, the two men left the clothing store, dressed without much change, except for the removal of high-tech from their clothes.

"There are no more such clothes sold above the ground, and in the whole world, it is estimated that only our dungeons are still producing and using these things."

Liu Xuan waved his hand undeniably, indicating that he understood what Li Ping meant. Most of them, who lived a hundred years ago, couldn't adapt to this kind of high-tech products. It's like wearing Shanxi clothes for primitive people, and it's uncomfortable. Primitive people should wear animal skins, people a hundred years ago should wear ordinary clothes, and now people in the new era should wear high-tech clothes, which has nothing to do with the times, but their own gradual adaptation.

Liu Xuan was in high spirits and asked Li Ping to go to lunch. The location is the same as a hundred years ago, the location of the store has not changed, and the location where they sit has not changed, it has become the era, the owner, and the people who eat together. Without the joy of the year, without Professor Ma, this belated celebration banquet is not only joy, but also a deep sadness.

In the afternoon, Li Ping and Liu Xuan said goodbye, she said that she would tidy up the things on the ground and move to the dungeon, and in addition, because she was completely out of touch with the knowledge of the times, she could no longer hold any important research positions. She decided to come to the dungeon, study, explore, and start as a small researcher.

Liu Xuan didn't stop her, he knew that once he indulged in one thing, he would be unable to extricate himself, let alone this sea of stars where beauty and danger coexisted?

The two separated, Liu Xuan went to the research room again, the new research room, he wanted to decipher those incomprehensible letters from outside the world, and that was to achieve real communication with them. By communicating with them, understanding to understand the meaning of their words, the final goal is to read the message.

In the afternoon, the research room was still busy, and Liu Xuan's return aroused their enthusiasm again, this time Liu Xuan did not delay any time, and directly found a research place at random, invited a senior researcher, and asked about the research process. In fact, the most senior in the entire research room is still Mu Guang.

"Thousands of years ago, we discovered that heavy element fission brings a huge amount of energy, and if it is not controlled, all the energy will be released in an instant, which is the atomic bomb. Through the efforts of our predecessors, we can control the chain reaction of nuclear fission to a certain extent, so that the fission process slowly releases energy, so that we can obtain powerful and long-term energy, and your engine also borrows this theory. Mu Guang gave Liu Xuan a careful explanation on the side.

Liu Xuan nodded, indicating that he was right, and motioned for him to continue.

"Eighty years ago, when you were still asleep, a great scientist, his name Ma Xuan, successfully controlled the nuclear fusion reaction, and as we all know, the energy produced by nuclear fusion is far stronger than nuclear fission. Professor Ma Xuan's research was soon applied to space engines, and after some improvements to your scheme, mainly to strengthen the strength of the material, we finally created a nuclear fusion engine. Mu Guang continued.

"Ma Xuan?! Professor Ma?! Liu Xuan was shocked in his heart, he didn't expect that Professor Ma would overcome such a global problem. Liu Xuan tried his best to keep his calm and motioned for Mu Guang to continue.

"Coupled with the emerging dormancy technology, powerful nuclear fusion engines make long-distance interstellar travel possible, however, an obvious problem is highlighted, if you want to carry out long-distance interstellar voyages, fuel is a huge problem, our spacecraft, warships have no possibility of carrying a large amount of nuclear fuel. The fusion material we rely on mainly today is deuterium-tritium, which is relatively cheap. The fusion energy of deuterium and helium triad has been used in the city, which has the advantage of being safer and the disadvantage that the raw materials are more difficult to make. ”

Liu Xuan nodded and said that he understood, in fact, these theories were put forward a long time ago. Liu Xuan is still relatively familiar with these, and now he has just turned the original conjecture into reality.

"Later warships and spacecraft were equipped with engines that could perform nuclear fusion and nuclear fission at the same time, and our idea was to use a way, or even a formula, to make all matter fission or fusion reactions. The ultimate speed of such an engine can reach twenty-five percent of the speed of light. Suppose that the spacecraft has no energy in space, and a small rock in space is randomly pulled into the engine and a huge amount of energy is generated. In the end, Mu Guang was completely intoxicated.

"How's the antimatter research going?" Liu Xuan continued to ask the next question.

"With the current technology, it is possible to produce some antimatter, which is very difficult to store, and if you want to make it in large quantities, it will still take time." Mu Guang answered Liu Xuan's question seriously.

"Is there any research on antimatter engines?" This is a new generation of engines envisioned by Liu Xuan, and nuclear fusion and nuclear fission engines are actually products that belong to the belt.

"Not yet, because most of the theories of antimatter are still only hypothetical, and it is difficult to release a large amount of energy generated by the annihilation of positive and antimatter, and antimatter is generally used to make antimatter missiles. However, I heard that there was a new breakthrough in the antimatter laboratory. We don't know exactly what the situation is, but antimatter has always been top secret. Mu Guang told all the news he knew.

"I already know the rough, let's get started now, I always have a bad premonition." Liu Xuan said with a serious face, he was not worried about humans, but about them, or using them.