This question was also pursued by Muyin.

It was also what he once fought for, was distressed, and even despaired.

Mu Yin lost his composure for only a few seconds before calming down. Looking at Cheng Yun's eyes, he pursed his lips, glanced at the female hero Yin on the side, and leaned lazily on the chair, answered with certainty: "I know."

"Can you tell me?"

"Happiness is at its peak." Mu Yin smiled slightly.

"Thank you," Cheng Yun said sincerely.

"You're welcome, this is just a small matter. If you can make you feel less regretful, I'm very happy." Mu Yin narrowed his eyes slightly again, "To put it, this question... When I just merged into the time and space nodes, a senior came to find me, and I asked him too."

"Is that right..." Cheng Yun raised his eyebrows, which was quite interesting.

Is it a convention of the ‘dominate time and space’?

"Yes, including the question you asked me before, I asked him." Mu Yin's smile became gentler, "That's how he answered me."

"..." Cheng Yun was speechless.

Will he also discover the newborn master of time and space in the endless lonely time many years later, and then find him and repeat what happened today?

"You can guess right. Today's events have actually been repeated many times between the masters of time and space." Mu Yin said.

"But there is one thing you might be disappointed." Mu Yin looked at Cheng Yun, his eyes as calm as water, and he could not see any emotions. "There are some rules in this universe that cannot be violated, especially when it involves the self-defense and security mechanism of the universe, and there is an upper limit for the lifespan of creatures. And this upper limit may not be as long as you imagine."

"Upper limit?" Cheng Yun's expression suddenly stiffened, "What is the connection between this and the self-defense of the universe and security?"

"Of course, it's related. Lifespan is the shackles of a biological race. If lifespan can be extended infinitely, this race has no upper limit. You can imagine what happens when the microorganisms in your body can grow up." Mu Yin narrowed his eyes and looked around, "Don't look at the fact that your universe has only taken so many years from its birth to now. I think the evolutionary history of the universe is only so long. In fact, our universe is far more intelligent than you imagine."

"Is the history of evolution..."

Cheng Yun suddenly opened his eyes wide and keenly captured this keyword.

Evolutionary history and lifespan are obviously two different things.

The current earth science and technology cannot touch this problem. There are always various research institutes that study it and announce the results, but each result is different. There are the most false and sensational ones that say that the universe has only a lifespan of more than one billion years. There are also relatively objective and conservative statements based on the law of decline, even if the universe decays from now on, it can still exist for so many years, to more than two hundred and more than three billion years, and the longest ones say that the universe can live at least more than one billion years...

But how many years has the universe evolved?

Or... how many generations?

Just like humans, their lifespan is only a hundred years, but it has evolved from generation to generation for millions of years.

Evolution is a screening process.

Only with inheritance can one be called the word evolution!

Is the universe also inherited from generation to generation?

Cheng Yun had faintly touched the key point.

Regarding the relationship between so many universes, why are there so many similarities and how are there connections between each other?

But even based on this critical point, there are still many possibilities. I think Mu Yin will not tell him directly about this.

Cheng Yun shook his head and shook these thoughts away. The focus of his attention should not be here.

"Can you even break this upper limit, this rule? Or is it meaningless when you can break this rule?"

Mu Yin was silent for two seconds again: "It's not possible."

"About two-thirds of the time and space masters have worked hard for tens of billions of years, and have been relaying, trying to break this rule one by one. It also includes me. As for why..." Mu Yin narrowed his eyes, "Maybe it's too boring for a long life, so I'm looking for something to do. Perhaps it's because breaking this rule itself has more meaning. Maybe... for the new time and space masters later."

"The age and lifespan of the universe can be seen, but no one knows how many years the endless universe has existed."

"Has anyone ever done this before? We don't know."

"Perhaps some of the predecessors did this, but this resulted in serious consequences, which resulted in the method not being passed down. Or the predecessors did not pass it down, but brought it into destruction. Even... the predecessors realized the consequences of breaking this rule and strengthened this rule."

"We can't guess these." Mu Yin said calmly.

"That's it..." Cheng Yun did not ask Mu Yin why he guessed that it might have serious consequences, and he still had to do this. Sometimes someone wants to do something, but he can really do anything.

For the future domination of time and space...

Another string in Cheng Yun's heart was touched. Although he was not sure whether the fact was true, he seemed to have imagined such a scene - one master after another of the time and space masters watched the friends around him, and their relatives disappeared one after another and were helpless, until the last friend died, until he no longer wanted to make friends, but he was still looking for ways to break this rule... It was just that in his long life, people wanted later generations to no longer experience this pain.

How long is time? In such a long life, I believe that many of the obsessions that were originally made will become insignificant, but this obsession can still be preserved in tens of billions of years...

It really makes people feel incredible and magnificent and speechless!

Soon, Cheng Yun asked again: "So how long is this upper limit?"

“How long…”

"The lifespan limit of each biological race, and even each biological individual, is different. If you talk about pure human blood, it is not much different..."

"The concept of time is too different, but in short, this time is not very long." Mu Yin said, "Only the origin energy is something that has the same nature no matter which universe it is in. If we take the time taken by the origin energy particles to vibrate a trillion times as a unit, then the upper limit of human life span is about 105 billion units."

"Every second spent by humans has an impact on lifespan. If every second does not have a negative impact on lifespan, then the maximum lifespan can be achieved."

"I still remember that it was about two thousand years before I was born on the planet." Mu Yin said.

"..." Cheng Yun pulled the corner of his mouth.

"Okay." Mu Yin continued to smile slightly, "Tell me first how your civilization sets the unit length of the concept of time?"

“…”

Cheng Yun only vaguely remembered that the length of each second was related to the microwave oscillation of the cesium atoms, but he didn't know how many times the cesium atoms oscillated for one second, and he didn't even know what the cesium atom was.

Mu Yin closed his eyes helplessly.

After a moment, he opened his eyes again: "Okay, the length of time used in your world to perform the isotope of a certain atom to 9192631770 transitions is specified as one second, every 86400 seconds is one day, and every 365 days is one year. According to the ratio of the atomic oscillation cycle and the vibration cycle of the original energy particle, this time is about 4,200 years as your civilization says, and the difference between the left and right is three hundred years..."

"About 4,200 years..." Cheng Yun said in a daze.

In other words, Cheng Yan, Tang Yaoyao, Yin Female Hero... etc., they can only live for more than 4,000 years at most.

Unless he can break this universe rule, this rule that so many great masters of time and space can't break even if they spend tens of billions of years... Even if he can do it, they will be gone long ago!

Cheng Yun suddenly fell silent.

Mu Yin seemed to see his thoughts and said, "If you feel unwilling, then try to find a way to break this rule. Even if it doesn't make sense to yourself, maybe there are future generations who need you to stop this despair for him. After all, only by experiencing it can you know how painful it is..."

Mu Yin looked at Cheng Yun calmly.

Cheng Yun also looked at him.

After a moment, Cheng Yun withdrew his gaze and asked again: "How many people have you seen...the same as us?"

"Have you seen it...seven or eight."

"You have lived for so long, have you only seen seven or eight?" After tens of billions of years, seven or eight! Cheng Yun suddenly felt a mess in his heart and almost suffocated.

"Yes, because we cannot go too far. The further we go, the greater the rejection of us by the universe until it is so big that we cannot enter." Mu Yin said, "So I have only seen the space-time master of the universe not too far around. About... there will be a space-time node in every seven or eight universes, and how many space-time nodes have a space-time master. This number is too big..."

"So that's it." Cheng Yun realized that what he said, "is not too far away" was actually a number that was too big to imagine.

"But we can contact each other and use endless time and space nodes to deliver messages." Mu Yin looked at him with a smile, "This method is very simple, but I can't tell you now."

"Why?"

"You're still too weak."

"Weak?" Cheng Yun was stunned.

"Yes, it's just the same as you think now." Mu Yin looked at him, "because there will be danger."

"Because the time spent in tens of billions of years is too long, and no creature can imagine it. Not everyone can keep their hearts in such a long time. I came to see you to confirm this. Now it seems that your performance is much better than I imagined."

"Are anyone lost?" Cheng Yun asked.

"Well." Mu Yin nodded. He was always proactive in talking to Cheng Yun. "Every time and space master dealt with the torture brought by a long life span, but it can be roughly divided into several types: some people are cruel and courageous enough to turn themselves into an indifferent god, without sorrow or joy, without excitement, without excitement, and without too much emotional fluctuation in something, so naturally they cannot feel grief; some people are too greedy and endure the pain and joy brought by joy and sorrow, and constantly endure the torture; some people use some methods to give up some things, in order to maintain their true hearts, they will still be similar to the time they were in the future... it looks similar;"

"Some people also have a weak mind, because of boredom, torture, because of the death of relatives and friends, and the sorrow of the destruction of their hometown, and you can never imagine what they will do."

"What will you do?" Cheng Yun asked.

"Maybe they will regard the universe as a plaything, which is good. Maybe they will take the initiative to look for other universes and transform into world-destroying demons. Especially if they love to find those universes that have just been born in the world-destroying master..." Mu Yin saw a look of vigilance appearing on Cheng Yun's face, and smiled again, "Because the new master of time and space is too weak to protect his universe, he destroyed his home in front of this master of time and space, turning his universe into an empty space, allowing the new master of time and space to experience the grief and despair he had experienced, and then collapse... Perhaps it can satisfy some of his abnormal desires."

"Haha." Mu Yin put down his legs and switched to the other side. "But when you meet such a person, you can ask for help from the space-time masters in other universes. Most of the space-time masters will be happy to help you solve this problem."

"..." Cheng Yun didn't say anything and looked at Mu Yin.

Mu Yin didn't mind this either.

"So, are you the third type? Which one to keep your heart?" Cheng Yun looked at Mu Yin tentatively.

Mu Yin always smiled, but this time she smiled but didn't answer.
Chapter completed!