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Lin Dong came to Shanghai as a private person, and no one informed him before coming, and no one knew anything except his accompanying secretary Xiao Tang. ￡∝

The reason why he suddenly arrived in Shanghai was the letter. When Xiao Tang found the previous letter from the comprehensive office and rushed back to the office, Lin Dong took out another hand-drawn drawing with his slightly trembling hands. When he saw the same drawing, Lin Dong's face flushed and he tried to restrain his overly excited emotions.

Let Xiao Tang go out first and look at the drawings alone. Lin Dong's thoughts seemed to float away, and even shed tears secretly. Although this drawing is very ordinary, the design inside is too backward for now, but Lin Dong will never forget it in his life, because the content of this drawing is the design he made by himself when he participated in the Galaxy giant universal integrated circuit project.

Moreover, there is another important reason why this design drawing is still fresh in his memory, because he still clearly remembers that it was the defects of the electronic circuit of this design that led to the endless debate with Su Yichen at the beginning. The two of them had their own opinions on this and almost refused to give in. They were so quarreled that it was red until Professor Wan Changchun finally decided to conduct repeated verifications before they came up with the result.

Time has passed, and although more than 30 years have passed, the scene of that year is still vivid in my mind. Now, the same drawings appear in front of me. How can Lin Dong be excited? Behind the excitement, there are incredible doubts, because there were very few people who experienced this incident at that time, and there were only Professor Luo Shaohua, Professor Wan Changchun, Lu Yuanming, Yun Mei, Luo Yan, and the six Su Yichen who argued with him.

Among these six people, Professor Luo Shaohua, Lu Yuanming and Yunmei have long passed away. Luo Yan has been missing after leaving Shimen Science and Technology. Professor Wan Changchun and Su Yichen mysteriously disappeared on the way to support the Northwest 781 base. Their life and death are still a mystery. So, who sent this letter? Could it be Luo Yan, who had no news? Or...?

Regarding the latter possibility, Lin Dong thought it was a little bit small, but he didn't know why he suddenly had such an idea. He couldn't wait to pick up the envelope and looked carefully. The envelope did not have the name of the sender, but the address was the sender. The address was written as a private bilingual middle school in Shanghai and the dormitory door number. Looking at the address on the envelope for a long time, Lin Dong quickly made a decision. He wanted to go to Shanghai to meet the sender immediately. No matter who the person would be, he must see him immediately.

He asked Xiao Tang to book a flight ticket for himself immediately, and at the same time told him that no one would not inform him about this matter. In this way, Lin Dong took the earliest flight to Shanghai. After arriving in Shanghai, he took an envelope and took a car to Yuying International Middle School. Standing at the entrance of this middle school, Lin Dong calmed down instead. After thinking about it, he asked Xiao Tang to wait at the door, walked into the school alone, asked someone to find out the location of the dormitory, and Lin Dong knocked on Su Yichen's door.

The door opened and the lights in the corridor were a little dim, but Lin Dong immediately saw who the person appeared from the door. When the picture made him extremely familiar and his face had almost not changed at all from Su Yichen who was smiling at him more than 30 years ago, Lin Dong was stunned at first, then raised his hand and rubbed his eyes incredibly, because he couldn't believe his eyes.

"Brother Lin..." Looking at Lin Dong, who was already old, Su Yichen spoke and exclaimed softly.

"I'm dreaming, right?" Lin Dong murmured to himself. Before knocking on the door, Lin Dong thought that the person who appeared behind the door might be Luo Yan, but who thought it was Su Yichen. Although Lin Dong had thought of this answer, he never thought that Su Yichen, who was standing in front of him, was so young, as if he had never changed from him in his memory. How could this be possible? More than 30 years have passed, and even if Su Yichen is alive, he is still nearly 60 years old. How could he still be like before?

"I must be dreaming..." Lin Dong said to himself, but when Su Yichen called him as lightly as he had ever been, Lin Dong was shocked suddenly, and his eyes suddenly became particularly sharp when he looked at Su Yichen. He glared at Su Yichen and shouted with vigilance and defense: "Are you a human or a ghost? Why is it Xiao Su?"

"It's me, Brother Lin, I'm me, of course I'm not a ghost." Facing the only living old friend in this world, Su Yichen knew that it would be difficult for the other party to accept his current appearance for a while. After all, more than 30 years have passed, and no one will be surprised when he sees him, let alone Lin Dong, who is not mentally prepared at all?

Taking a step forward, Su Yichen held Lin Dong's trembling hands. He told Lin Dong that the drawings were sent by himself, and also told the story of their arguments over this design back then. As Su Yichen said, feeling the warmth coming from his holding his hands, Lin Dong began to believe that the young man in front of him was Xiao Su of the past.

"But why are you...?"

"I encountered some accidents on the way to Base 781 with Professor Wan. These words are too long to say. If you want to know, I will talk to you slowly."

Su Yichen mentioned the names of Base 781 and Wan Changchun. Lin Dong had already completely believed in the other party's identity. At this moment, he couldn't help but burst into tears and grabbed Su Yichen's shoulder hard for reproaching him for appearing.

"Brother Lin, this is not a place to talk. Let's find a place to sit." Looking at Lin Dong who was too excited, Su Yichen suggested softly. Lin Dong nodded in agreement. Su Yichen asked him to wait, and returned to the house to greet Kevin who was taking a shower. Then he found the key to the dormitory that Tang Wei had left for him before. Since Tang Wei left, his dormitory has been empty and unoccupied.

He took Lin Dong to open the door of Tang Wei's dormitory before, and the two walked in one after another. The personal belongings in the room had been cleaned up long ago, but the bed, tables and chairs and other simple furniture were still there. He gave the chair to Lin Dong, and Su Yichen sat directly on the edge of the bed. At this time, the sunset outside the window shot into the room from the gap in the curtains, which happened to shine on Su Yichen's face. Lin Dong looked up at Su Yichen's appearance, as if he had returned to the time of the year.

"You are really Xiao Su, you are really Su Yichen!" At this time, Lin Dong did not hesitate anymore. He was sure that the young man sitting in front of him was Su Yichen back then, but he had been missing for more than 30 years, so why was he still so young?

"You know this when Professor Wan and I went to the 781 base as the first group of personnel to report it." Su Yichen sat down and said, very well, Lin Dong was confused at this time, and even if Lin Dong didn't ask, he would tell him what he had happened back then. With Su Yichen's remarks, from that year he and Professor Wan Changchun came to Yingtai, and then met Hu Zhijun and Gudamai who came to pick them up at Yingtai. He slowly talked about the road reasons that they drove across the grassland to the 781 base, but were chased by wolves halfway. Then, when they fled, they accidentally entered the desert, until they discovered a strange building in the desert, and Gudamai was swallowed by quicksand. He, Professor Wan Changchun, and Hu Zhijun were trapped in the depths of the base together...

This lecture lasted for a long time. Lin Dong did not interrupt anything in Su Yichen's story. He was listening quietly, but the surprise and shock in his expression could not be concealed. Lin Dong never expected that there was such a place in the vast desert in the northwest, and it also involved the existence of an extremely developed high civilization in the universe - the Rand civilization. Even the mysterious base was hidden in the huge secret of human origin.
Chapter completed!