There was a creaking sound from above the tombstone, Liu Xuan looked closely, and something popped out at the base of the tombstone, which seemed to be a drawer.

However, there was nothing in it, only a small circular hole, and it seemed that the cylinder in Liu Xuan's hand was inserted here.

Liu Xuan didn't think much about it, since the keyhole appeared, now is the time to insert the key, take out the key, aim in the direction, and insert this cylinder into the hole without hesitation.

Without the slightest error!

The cylinder just plugged the hole completely, and only the clicking sound was heard, and it seemed that the machinery in the tombstone had begun to work because of the appearance of this cylinder.

The fingerprint recognition place that Liu Xuan found just now, the small hole completely popped out, and there was a small gap inside, and in the gap, a very thin memory card was stuck inside, it seems that this is what Professor Ma Xuan wanted to leave to Liu Xuan.

Liu Xuan took out the memory card with trembling hands, it seemed that there was some sensing device next to it, Liu Xuan had just taken out the memory card, and all the things that popped up in the entire tombstone were taken back, even the cylinder was the same, and it finally returned to where it should be.

Liu Xuan solemnly bowed three times in front of Professor Ma Xuan, and then walked in the direction of his home.

Not being able to go back to the institute, this may be the last time he and Professor Ma will face, even if it is only a memory card.

The first time she saw Liu Xuan come back so early, Li Ping was obviously taken aback, seeing Liu Xuan's confused appearance, Li Ping was shocked, she was afraid that Liu Xuan would go crazy because of his research.

"Hahaha." When he returned home, he didn't take off his coat, just sat directly on the sofa and laughed, but there was a sadness in this laughter that was difficult to hide, and Liu Xuan's tears fell when he smiled and laughed, seeing all this, he frightened Li Ping next to him.

"Liu Xuan, don't scare me, don't study it, forget it, you've done a good job." Li Ping immediately thought that he was driven crazy by research, he knew how much pressure Liu Xuan was under now, from the chief designer who was admired by everyone to the current unknown researcher, Liu Xuan was accused and pointed at behind his back, these Li Ping all knew.

"This is Professor Ma's last gift." Liu Xuan said as he took out the memory card from his pocket.

This move stunned Li Ping, and frightened Li Ping even more.

Seeing Li Ping's appearance like this, Liu Xuan told his discovery, and then Li Ping's face changed, becoming as sad as Liu Xuan, none of them thought that Professor Ma would spend so much effort to leave them a gift.

Suppressing his sad emotions, Liu Xuan found a card reader and inserted this memory card into the computer, speaking of which, this memory card is very old, the memory card itself has been discontinued globally decades ago, and the card reader is also difficult to find, fortunately, Liu Xuan has collected one by himself.

There were two files in the memory card, a text document and a video, without thinking too much, Liu Xuan directly opened the video file, just like Liu Xuan imagined, Professor Ma Xuan's face appeared on the computer screen. It's just that the current Professor Ma Xuan is sitting in a wheelchair, his hair and beard are all white, and it seems that this video should have been taken a few years before Professor Ma's death.

"Liu Xuan. When you found this memory card, I may have been dead for more than ten years, I guess Li Ping is also by your side, I don't know what your relationship is now, but first of all, I want to congratulate you, you escaped the sanction of time and passed your freezing period safely. ”

Speaking of this, Professor Ma Xuan paused, Liu Xuan and Li Ping's tears couldn't help but flow, the decades that Professor Ma Xuan said are now nearly a hundred years old. I haven't seen it for a hundred years, and heaven and man are forever separated.

As if he had guessed the state of Liu Xuan and the others, Professor Ma continued: "Don't cry, I can't stand the old man." Speaking of this, Professor Ma Xuan in the video smiled.

"Okay, now it's time to get down to business, the purpose of leaving this video is to hope that Liu Xuan can release this technology to the world at the right time. When I was alive, I had already discovered the mystery of fission or fusion of matter, and I had written the most crucial formula, which was recorded in the text file next to the video file. ”

"What I'm going to say is not the use of this formula, after a simple study can only find the use of this formula, I believe you have the ability."

"What I'm going to talk about today is really a question of ethics and morality. You may be thinking, I have already researched it back then, why not publish it. Because I am afraid that after mankind had nuclear fission and nuclear fusion engines at that time, the development of the aerospace industry could not be described as a rapid progress, but at this time, the nature of human beings was revealed. ”

"Greed, lust, endless taking. All of them look so dazzling. With their powerful power, for their own glory and wealth, they brought back large and small stones from space, most of which were rich in precious metals. ”

"Human desires are like rolling rocks in a mountain, once they start, they can never be stopped."

"In the last years of my life, I worked out this formula, but morally, human beings are simply not up to par. The people in power can't control their desires and bring things back from space again and again. But fortunately, the things they brought with them have undergone the wear and tear of the atmosphere, and although they have lost a lot of precious metals, they have completely wiped out the super viruses that may exist in space. The law of gravitation shows that there is a direct relationship between mass and gravity, and if this continues, the gravitational force of the earth will increase infinitely, but at that time, I had no way to stop all this, so I didn't announce this technology. ”

"I hope that before you publish this technology, you can solve this problem first, and let human morality or law limit human desires."

"The second ethical question, I've been thinking about, is a human being who is really far away from the earth and into space still considered terrestrial creatures? Ethically, it simply doesn't make sense. I'm afraid that when humans return, they'll no longer be human. On the bright side, they have evolved to another level of life; In the worst way, they may lose their human hearts, that is, they are a bunch of crazy people with cutting-edge technology, and that's the most terrible thing. ”

Liu Xuan nodded all the time beside him, he was worried about what Professor Ma said, but he didn't think deeply, Professor Ma's remarks today were like an initiation, which made Liu Xuan more aware of these problems.