"Hahaha...... Understandable. Her personality is not something that ordinary people can bear! My name is Gu Tian, since you are still a friend, if you don't dislike it, you can also call me Grandpa Gu like her. The old man said with a smile.

"Okay!" Chen Tian nodded.

"It's been a long time since I've been here, how could I come here with you, a descendant of the Four Saints, this time?" the old man asked curiously.

"It's the old Taoist, that is, the Zheng Xundao in your mouth. We went through some things together and then went back to Liudao Mountain to rest. The old Taoist priest wanted to do something, so he asked me to take her with me. Chen Tian explained.

Facing the old man in front of him, Chen Tian felt a little unnatural, probably because he had never been in contact with a rich man in his life, and he felt a little inferior in his heart.

"What you have experienced together, what the Six Realms and One Pulse and the Four Saints and One Pulse have done together will definitely not be a trivial matter, can you tell the old man about it?" the old man became even more curious and asked.

Chen Tian thought for a moment, these things were not a secret, and said: "Do you always want to listen to the beginning or the latest? After all, there are quite a lot of these things to talk about. ”

The old man smiled and said: "I don't have anything to do, I still have plenty of time, I might as well start from the beginning, I started listening halfway, but it's not enjoyable." ”

Unexpectedly, the old man was still a person who loved to listen to stories, so Chen Tian adjusted it and began to tell it.

It started from the first time I met the old Taoist priest.

Don't look at it and only talk to the old Taoist priest for a few months, but after telling this story for a few hours, I gave a rough story.

After listening to Chen Tian's story, the old man thought about it and said to himself: "No wonder!"

Chen Tian looked at the old man suspiciously and asked, "What's wrong?"

The old man smiled and said, "That's the case, I forgot to tell you that although I don't practice, I still have some research on cultivation. I put a lot of effort into building a machine that can detect changes in the energy of this world!"

Chen Tian was extremely surprised and said, "Is there such a thing?"

The old man said with some modesty: "This is not a difficult thing, just like detecting the tide of the sea, the weather is the same." It's just going to take some time to fiddle with. In recent days, the results of the machine's detection are a little strange, and the energy is rising within the detection range of the machine, that is, in China. ”

"What's going on?" asked Chen Tian puzzled.

"In other words, the energy density of the Huaxia range where we are located has increased. Before, I was still very puzzled, and I also used some connections to find some cultivators to consult. However, they did not know, let alone explain the reasons for the situation. The old man said.

"What do you mean, this change is related to the revival of the underworld?" asked Chen Tian.

"Probably! From the perspective of time alone, this is in line with the time of change. The old man said.

Then he brought a pencil and a piece of paper, which had some lines on it, and the old man circled one with a pencil, pointed it to Chen Tian, and said, "These are the test results of the past ten years, and the test results of the entire Huaxia region. The energy has been decreasing, and it seems to be dissipating faster and faster as society develops. But just a few days ago......"

The old man pointed to an upward line and said, "This is the trend of energy changes in recent days, energy has been increasing, and the speed of increase is getting faster and faster!"

"This should be a good thing, right?" asked Chen Tian uncertainly.

The old man replied, "From the perspective of your cultivators, if the energy of this world increases, then your cultivation will become easier, that is, you can absorb more energy and fuse yourself. You should be able to understand that energy is like molecules, and you are a fusion of molecules, and the more molecules you have around, the faster you can absorb them, and let the molecules attach to them...... The more energy you absorb, the stronger you will become. ”

This old man is talking about molecular theory! Chen Tian had heard the old Taoist priest say it. The old Taoist priest said that it was a secular physics expert.

Chen Tian looked at the old man in front of him, the serious expression when he was studying academics, and corresponded to what he had said, and asked curiously: "Grandpa Gu, should you be the physics expert in the mouth of the old Taoist?"

"Physicist, did he mention me to you?" Gu Tian said with some surprise.

Seeing Gu Tian's reaction, Chen Tian knew that the person in the old Taoist's mouth was most likely a physics expert. Then he said, "If he hadn't met other physicists who had studied cultivators, he would definitely be talking about you!"

Chen Tian still remembered that the physics expert that the old Taoist priest was talking about was an ordinary person who made the simplest definition of cultivation.

Even the old Taoist priest agreed with his statement, which showed that it was very reasonable.

Some things are difficult to understand, not because science can't explain them, but because we need some technology to explain them.

Science can produce science and technology, and only when the level of science and technology is reached can it be explained. So many times, when the level of science and technology is not reached, people directly give a sentence, which is not scientific. This is an irresponsible attitude.

In fact, they don't really understand.

"I didn't expect that after many years, he would still remember what I said, did he say anything else?" asked Gu Tian very happily.

"Nothing else, he just told me about the theories you said about spiritual practice. Say what you said makes a lot of sense!" Chen Tian said.

Hearing Chen Tian say this, Gu Tian laughed happily.

Chen Tian looked at the lines on the paper and asked: "If it is said that the energy is related to the recovery of the underworld, then there is only one explanation, the seal of the fief not only seals the underworld, but also locks the energy of the human world, it may be ......"

Chen Tian's expression is not very clear.

Gu Tian nodded, as if he understood what Chen Tian was going to say, and said, "The seal of the fief you mentioned should be the main reason for the decrease in energy. It's just that its effect is not to absorb energy, but to seal the energy, so that the energy is no longer transmitted to the outside world. ”

"Yes, that's what I said. But I don't understand, since the decrease in energy is not good for cultivators, thousands of years ago, why did my ancestor arrange for people to make up for the heavenly fiefdom?" Chen Tian asked suspiciously.

"It's something to think about, but I think it's all about heaven and earth. What is heaven and earth? Earth may refer to the underworld, but what about heaven?" Gu Tian picked up a pencil and drew a few lines on a blank piece of paper.

He first pointed to a line below and said, "This line is the words of the underworld!"

Then Gu Tian pointed to the middle one and said: "This line represents the human world we are in, according to what you said, the underworld may be underground, or in some special space underground, similar to parallel worlds and the like. ”