Liu Weichang talked with Gu Silen in the office for a while, learned about Gu Sileng's basic academic situation, and felt very satisfied after reading his materials. He said to Gu Silen: "It has been a long time since you left the school, and during this period of time, the knowledge of the school has not kept up with the progress of the times. In the time that you have been fighting against Japan, there have been two iterations of international knowledge about space exploration. But that's not the most important thing. You can now take a course on the master's level, write a thesis, and then you can follow me directly on the Ph.D. side. Mine is studying deep space astrophysics, and there is a lot of intersection with your deep space exploration. Let's think about it, when we met, we were once looking at the starry sky on the Inner Mongolian prairie, can you still recall it now? Gu Silen said with a smile: "I remember that picture from my childhood all my life. Good. In the beautiful savannah, the Milky Way slid down from the sky like a ribbon, and the whole was full of stars, and the light of the moon did not seem to be so dazzling. Liu Weichang smiled and said, "Yes, your hometown is indeed a good place for stargazing." At that time, did we still talk about the Nezha deep space probe? Gu Silen thought and said, "Yes." I remember you also talking about Proxima Centauri. ”

Liu Weichang smiled: "It's really good. Our current Department of Astronomy at Peking University is building a huge experimental station for space imagery that has been observed by humans. In this image, you can find any galaxy, any nebula, any planet or star that humans have observed. Guzmán said: "Isn't that a huge amount of data? "Liu Weichang. Nodding his head, he said, "This is not a separate scientific research project in our country, it is shared with all countries in the world, and its name is Starcurtain. All galaxies within more than 20 billion light-years of the farthest reaches of mankind have been observed. In other words, with this mirror galaxy, you can find any galaxy in the universe within 20 billion light-years. Gu Silen said in surprise: "Such a grandiose, this flower man's life." It can't be done. Liu Weichang said: "I am just one of these scientists. Hundreds of thousands of scientists and thousands of scientific institutions around the world work closely together to conduct deep space exploration. They have the Hubble Telescope from more than 200 years ago, and they also have hundreds of different cosmic deep space probes launched by various countries today. They never stop in the universe. Now you can understand what it means to be splendid. The brilliant back of every galaxy is the sweat of the cosmic people's non-stop dedication and labor. Gu Silen nodded and said, "I will complete the task you assigned to me ahead of schedule, and then join this huge event." Discover our own new planet? ”

Liu Weichang said to Gu Sileng: "I can understand your feelings, but academic work still needs to be done solidly. Now I have more than 20 papers in hand, you can go and see what you have learned first, strengthen your basic course, and then we will conduct research on space exploration. Gu Silen replied solemnly: "Okay." Mr. Professor, I will definitely complete the task you have given me. Subsequently, Gu Sileng took over more than 20 papers handed over by Liu Weichang. These papers add up. There is a thick book, so thick. Gu Sileng easily took him over, and then gave Liu Weichang a military salute. Liu Weichang nodded, waved his hand and said, "You go down." Gu Silen walked out of the office with the materials. Go to the department and report. I found a teacher who taught me. I started my studies in the Department of Astronomy at Peking University, and it may be easy for Gu Silen to study. His results have always been outstanding. Even at the National University of Defense Technology, he never fell behind in the courses of manipulating weapons and equipment and repairing weapons and equipment.

This kind of theoretical study is even more familiar. But when he read the paper given to him by Liu Weichang, he encountered unexpected difficulties. In the imagination, a thesis on deep space exploration and astrophysics should be as interesting and vivid as a science fiction novel or a science fiction movie. In reality, academic papers are dry and obscure. It took a long time for Gu Silen to read the first academic paper, almost a month without fully reading it, and kept going to the library to consult the materials. It took a month and a half for the teacher to get a rough understanding of the paper. It's not just about observing space, it's about practice. There's a lot of new technology in it. As. Quantum computing. Physics research is all in it, involving more than a dozen disciplines. Gu Silen had to learn from scratch one by one, make up for every shortcoming, and then make his first bucket, hoping to fill a bucket of water with the hope that the bucket could be filled. It takes a lot of time and effort. Quantum computing was not something that Gu Silen had learned, and he didn't even know anything about it. He had to find lessons and videos. Go to the top and learn. Just like Professor Liu Weichang said, we must lay a good foundation step by step. It may be a good help in future study and research. If you are too ambitious, in the end, all research will be a castle in the sky, and a house in the desert will fall down if you push it.

Studying, very busy, Gu Silen plunged into it, and did not contact Zhufeng and Wu Jingquan during this period. However, what made him happiest was that every once in a while Natasha would wait for her to call. After a busy day, Gu Silen returned to his bedroom, took a shower, changed into comfortable pajamas, and listened to a piece of soft music. That's when Natasha called, and Natasha said on the phone, "You've come from. Ningbo has come to Beijing, which is closer to us. When did you come to St. Petersburg? Natasha said angrily on the phone. Gu Silen said: "The study is very intense, I didn't read it directly, there are many courses in it that I have not learned, I don't know many methods and learning methods, and I have to spend a lot of time." Gu Silen said. Natasha continued on the phone: "I don't care, I've been waiting for you for a long time. We can't just be like this all the time and not see each other for a year. In that case, how can I live with the man I love? Hurry up and come to St. Petersburg. Summer in St. Petersburg is beautiful and not cold at all. Flowers of all colors bloom like brocade. There are tall trees here, all of which are of the kind that are hundreds of years old. And the palaces in St. Petersburg are no worse than the Kremlin, and these are not enough to mention your teachings? Then there's me here, think about it, how long hasn't touched me. ”

When Gu Silen heard Natasha's words, his heart was excited. Indeed, after the war against Japan and a series of things, he didn't even think about touching a woman. Since separating from Natasha, it seems that she hasn't touched a woman for a year or two. That's when I realized that this was a very serious problem. Gu Sileng gritted his teeth and said, "You bear with it a little longer, Natasha." I have to do the job at hand solidly. If I have a phased grade, I would like to apply to St. Petersburg University. As visiting scholars, that's when we can be together. By the way, we got married, and there was no problem. Natasha said dissatisfiedly, "You're painting me a pie again." It's always like this, I don't care, you have to come to St. Petersburg to me within a year, or I'll be a bad guest to you. "Go. Gu Silen said: "Why are you welcome? Aren't the two of us very nice? Natasha said angrily, "Come here in a year, or I'll go find another man." Are you going to let me grow old in your tree? After saying that, he hung up the phone in shame. Gu Silen smiled bitterly without help. Still turning around and smashing into their own learning.

Gu Silen was more immersed in the study of astronomy. The more I have great respect for the ancient Chinese. Especially China's greatest astronomers, Shi Shen and Gande. They were all during the Spring and Autumn Period and the Warring States Period in China. of people. They didn't have computers back then. There are no astronomical telescopes. Actually with their methods. The positions of 121 stars were found. The retrograde motion of Venus and Mars was discovered. Galileo and Copernicus more than 2,000 years later. Or according to the star map they made. Europa 2 was found in the solar system. All these achievements are undoubtedly the existence of God. Gu Silen had such a great astronomer for China. I was fascinated. He was curious about how the bearings, longitude and latitude of those stars were calculated. In that era, I had not heard of it. Calculus. However, the fact is that they were accurately calculated. That happened during the Spring and Autumn Period and the Warring States Period. You can't imagine achieving such results. It happened BC. For this reason, this incident greatly encouraged Gu Sileng. With such an excellent senior. What other learning difficulties can not be overcome?

Gu Silen is stuck in the laboratory day by day. Not only studying astronomy, but also physics. Mathematics. Chemistry. Even mechanics. These are all means of learning astronomy. After many nights of studying, Gu Silen was finally able to calculate. Calculate the position of a star in the distant starry sky. It thrilled him. Although the star has already been discovered, it can be calculated by hand after all. To this end, he wrote a small essay. It was handed over to Professor Liu Weichang. Professor Liu Wenxiang is very satisfied with his progress. He said to Gu Silen, "You calculated the position of the star. It was discovered 300 years ago. But your method of calculation. Be unique to yourself. Although it cannot be used as a major scientific achievement, it should be no problem as a master's thesis. With this dissertation, you will be able to successfully progress to your PhD studies. Gu Silen, you have to come on! You didn't come from reading all the time. It means that you have to give more than others. Gu Silen heard Liu Weichang's affirmation. I'm very happy that I can finally graduate with a master's degree. You can enter the doctoral level right away. This is really happy for him.

Gu Silen has always had one thing that he hasn't told Liu Weichang. That's what he once found in alien ruins. Items left behind by aliens on Earth. And I had two conversations with the alien prophets. Just like he said to Zhu Feng. What happened before, there is a state to understand. He told the state everything. But from now on this is his own secret. Doesn't belong to anyone. I don't want to be involved in this aspect in my work and life. Gu Silen has always made up his mind like this. But people. Curious by nature. The more forbidden curiosity becomes. Especially in a discipline like astronomy, which requires more curiosity. With Gu Silen refining in astronomy. He remembered not only the aliens, the prophets said to him. Did the prophet speak to him to ask him to discover an alien civilization? It is also for the continuation and contribution of human civilization. This is in Guslen, where no answer is obtained. Everything is still unknown. Be as you explore and work hard. Just like Yu Zhufeng said. The prophet must have his reason for choosing Gu Silen. If it was only the first discovery of the ruins, then more than thirty soldiers found it. Why was it only Guslen himself who saw the prophet? And in the years that followed, the Prophet reminded him a second time. This cannot be said to be a coincidence, but also a fate.

The study at the doctoral level is more in-depth. Gu Silen had access to a large number of images from the Nezha deep space probe. Nezha liftoff probe. It crossed the solar system more than a dozen years ago. Like the direction of Proxima Centauri, go away. Brought back a lot of precious pictures and materials. This made Gu Silen very excited and happy. I didn't think I could do it at the doctoral level. Learn such cutting-edge astronomical knowledge. He also participated in the study of the Star Curtain. The Star Curtain is a project shared by renowned astronomers around the world. Join this project. It means making progress with thousands of peers. One night. Gu Silen was alone in the laboratory. The surrounding colleagues are off work. Professors of the research group. They all went home and did other things. He was the only one on duty. On the display of Nuoda. Then there was a strange sound wave. This sound wave was transmitted back by the deep space probe, Nezha. He doesn't feel like he's in the universe. Eerie white noise. It's kind of like the cry of a bug. But not the radio waves emitted by intelligent life. It has not been confirmed. This long stretch of sound wave is vividly preserved. Gu Sileng immediately gave it to Liu Weichang. When he dialed up, he also told about his findings. Liu Weichang was very surprised after hearing the radio waves. Nor could he explain it. So he reported it to his superiors.

This strange sound wave. It alarmed the Chinese astronomical community. These famous astronomers. I don't know about the Nezha liftoff probe. Whether the sound waves coming back are the communication of intelligent life. But interpretation is in full swing. The sound wave was discovered. Gu Silen has received a great deal of attention. The actions of Chinese astronomers. It aroused the curiosity of astronomers around the world. Everyone has participated in the cracking of this sound wave. St. Petersburg University. Astronomer. An invitation from the association to Gu Sileng. Hopefully, he will serve as a visiting scholar. Went to study at St. Petersburg University. This was approved by Professor Liu Weichang. I thought I was going to meet Natasha soon. Gu Sileng was very happy and excited in his heart. Like Natasha said. I hadn't seen him for a year or two. This feeling. It's like fire from the soles of your feet all the way to your heart. Fortunately, this time it was an invitation from St. Petersburg University. You can learn again, and you can meet Natasha naturally. Gu Silen seemed to want to jump. Liu Weichang of Peking University has agreed. Gu Silen gathered his luggage. And the important things to bring. Farewell to Liu Weichang. Got on a plane to St. Petersburg.

In the sky, the plane is like a big bird's. Wide-body jet intercontinental airliner. Wide wings. Huge fuselage. Flying in the sky. It's like a large warship floating in the clouds. This is made by the Commercial Aircraft Corporation of China. The most famous wide-body jet intercontinental airliner. This large passenger plane can accommodate more than three hundred and forty people. It has encroached on 52% of the global market. In modern times this blue planet. Almost most countries are adopting it. It has left Airbus and Boeing far behind. Guslen chose a window-side location. You can see through the window. Dazzling sunlight. Golden sun. On the sea of clouds. It looks incomparably splendid. The fuselage is surrounded by white clouds. They kept churning. Like the waves of the sea. Airplanes are riding on waves. It's a great feeling. The planes kept flying in the sky. Gu Sileng was a little tired. He closed his eyes and fell into a deep sleep. When he woke up. The plane has already entered Russia. The customer window looks down. Countless mountains, rolling hills, verdant forests, lush. There is also a waterfall hanging on this mountain. Like silver water washed down. The view is simply stunning. The whole earth. Magnificent, expansive. with China's. The view is completely different.

The plane continued towards St. Petersburg. I don't know how long it took. Gu Silen's stomach was a little hungry. The stewardess brought him pasta. A small salad. These are all tasted by foreigners. Gu Silen is not picky either. All of the three and five divided by two were eaten. There was some slight distension in the stomach. I asked for another glass of fresh orange juice. When all the fresh orange juice is drunk, it feels cool and sweet. The abdomen spreads all the way to the whole body. If you're sleepy, you can sleep on the plane. When Gu Silen opened his eyes again, the plane came to a steady stop at St. Petersburg Airport. Get out of the plane. The sun is shining on the airport? Appears warm. People left the plane in a hurry. St. Petersburg Airport. It is also a large international airport. Although it is not as good as Beijing Airport, it is not as good as most airports in China. But the airport here has a steep history. Because he has been running for many years. Like a white-haired old man with a flowery beard. It's a story. Gu Silen didn't care. Walked out of the airport. Outside, he saw Natasha, who he thought about day and night.