The third day of return flight.

The scheduled continued meeting did not take place because the five people in the spacecraft now had new issues to discuss.

That is...where exactly are they in time now.

According to the atomic clock carried by the spacecraft, the time node they were at should be less than an hour before departure.

But this is obviously the wrong time.

Because regardless of whether relative time in the transcendent space will stand still or cycle in a relatively imaginary concept of time, they cannot change or affect the time sequence of the spacecraft's atomic clock.

What's more, the atomic clock is an objectively existing thing that can be affected and changed, so it was ruled out first.

So at what point in time are Su Wanxia and the other five people?

"I think, regardless of whether Brother Chen's prediction is true or false, we can see it clearly as long as we return to the vicinity of the earth? Do you think so? Isn't this a very simple problem that can be solved?" Chu Xiaoming was very happy Think about it.

Shen Yinuo shook his head and said: "No, this is not simple at all."

Chu Xiaoming's smile was stiff, probably because he didn't expect that the first person to tear him down would be Shen Yinuo.

"Yes, whether from a chronological perspective or from our current situation, we can no longer make any rash moves." Yan Sichen gave his opinion.

"What do you mean?" Chu Xiaoming asked.

"I suggest shutting down the spacecraft engine until the problem is clarified before deciding whether to return."

"Ah?" Chu Xiaoming was dumbfounded.

"I don't agree." Su Wanxia made a decision immediately.

"You don't agree? Why?" Xian Qianhua asked.

"There's no reason, we just can't stop here. We don't have time to waste." Su Wanxia didn't intend to explain in detail.

Xian Qianhua said, "A waste of time? Why do I think that the most important thing we lack is time? Imagine if the spacecraft runs out of fuel and flies back to the earth but no one can support us, then we can only wait to die. Yet?"

"That's what I say, but even if we don't do anything, will someone come to save us?" Shen Yinuo still prefers Su Wanxia.

Xian Qianhua said: "What do you mean? Aren't we discussing?"

"We are discussing a problem, but the problem is obviously not solved by imagination, don't you think?" Shen Yinuo and Xian Qianhua were tit for tat.

Seeing that the situation was not right, Chu Xiaoming immediately persuaded him to make peace: "Hey, hey, don't be anxious, everyone. Anyway, the supplies we have now are enough for the five of us to last for a year and a half, so we can take our time if we have anything to say. Say it, say it slowly."

After Xian Qianhua and Shen Yinuo heard this, they calmed down a little and finally gave Chu Xiaoming some face.

At this moment, Yan Sichen suddenly said something else: "Miss Shen is right, imagination cannot solve the problem, but three years ago the Shanhai National Space Station implemented a preliminary plan to explore Mars, code-named 'Fengying'. A simple description of this plan is to deliver supplies to a predetermined area before sending out the Mars exploration team, and the detection robot will build a camp in the target area first. The "Abundance" plan that I personally participated in has been carried out three times, and all three times It succeeded, so...if we change course and head towards Mars now, we can settle in the camp, so that we can last for at least ten years."

"Ten... ten years?" Chu Xiaoming really didn't know what happened on the Shanhai. After all, they were not in the same department before.

"Yes, ten years." Yan Sichen was sure of what he was talking about.

But Su Wanxia said again: "Why don't you leave the earth and go back to that barren land of Mars? Are you so sure that there is nothing left on the earth?"

Yan Sichen said seriously: "I'm not sure, but based on the 'Arrow of Time' theory, I think it is more beneficial for us to go to Mars."

"What arrow?" Chu Xiaoming was stunned.

Xian Qianhua was delighted: "Xiaoming, your academic qualifications are fake, right? You don't even know this?"

Chu Xiaoming's face turned red and he argued: "I am majoring in data system maintenance and management. It is normal for me not to understand these time and space."

Xian Qianhua stopped talking, but her smile remained.

Yan Sichen explained: "The 'Arrow of Time' is actually very easy to understand. It's just like if you choose a direction, such as south, you keep going south. No matter how far you go, as long as you turn around, you can go north again. Then follow this

According to a theory, in 'virtual time', the development of things is moving forward. As human beings who can master self-awareness, should they regret at any time and retreat at any time?"

"This...of course it can't be done. Could it be that if the cup is broken, it can recover on its own?" Chu Xiaoming said.

"Yes, this is the 'Arrow of Time' theory. Although we can't see time and don't know what it looks like, time affects us all the time. Moreover, we can only remember the past, but we don't know what it looks like.

Methods to define the future are just like when we choose a direction to move forward in reality, we can only move forward but cannot retreat. If you explain it this way, can you understand my previous concerns? "

"Oh...I understand...but by saying so much, don't you just want to say that there is no regret in the world and that we should be more cautious? In data analysis, this is called the optimal solution."

Yan Sichen was stunned when he heard this, then smiled slightly and said: "Yes, you are right, I was showing off."

"Uh, no, no, no, I'm just thinking about it after the fact. What about the sunset? I'm the most undecided right now. If you say you want to go to Earth, I'll accompany you."

Su Wanxia glanced at Chu Xiaoming gratefully and then said: "Thank you Xiaoming, but... Yan Sichen's words reminded me... maybe we should stop first."

"Huh? You changed your mind and went to Mars so quickly?"

"No, we're not going anywhere, at least within a week, and we're not going anywhere before we get results." Su Wanxia stood up and went to the cockpit.

Shen Yinuo stood up and followed him.

Chu Xiaoming and Xian Qianhua were still sitting in the restaurant.

After a while, the spacecraft stopped.

…

The discussion enters the second stage.

"The atomic clock cannot be used as a reference. Now unless we can contact the space station or Xinghan ground base, we have no way to determine the current specific time." Shen Yinuo first put the situation on the table.

"No, those are not important now." Su Wanxia seemed to be a different person after she came back. He stood up, took out a cup from the cabinet, put it in front of everyone and said, "We must first determine whether we are still here.

In the universe we all know."

"How to be sure?" Chu Xiaoming asked.

Su Wanxia pushed the cup down the table without saying a word.

With a crisp sound, affected by the gravity system of the spacecraft, the ceramic tea cup made through the reaction of high temperature and soil shattered.

Everyone was stunned, except Su Wanxia.

"Damn it! You are such a prodigal! Why did you suddenly drop the cup?" Chu Xiaoming hurriedly stood up and planned to clean some, but Su Wanxia stopped him and said: "As everyone can see, no one expected what was going to happen next.

The cup broke, right?"

Everyone nodded.

But Su Wanxia still asked Yan Sichen one more question: "Are you sure?"

Yan Sichen did not speak this time.

Everyone was surprised by Su Wanxia's behavior, but no one asked questions.

Seeing that Yan Sichen didn't answer, Su Wanxia explained: "Just like the concept of 'time arrow' that Brother Chen explained to us just now, we can only remember the past, not the future, so you didn't know that I was planning to do this before I smashed the cup.

Even if you do it, you won’t know how the cup will break after it hits the ground, right?”

"Yes, yes, but what next? What kind of medicine is in your gourd?" Chu Xiaoming was anxious.

"Okay, if this is the consensus, then why is it? Why can the cup only be broken but cannot be reassembled by itself?"

Su Wanxia looked at Xian Qianhua, who started playing video games without interest.

Looking at Yan Sichen again, he nodded thoughtfully, but did not express an opinion.

As for Shen Yinuo, he was sulking.

When seeing Su Wanxia's incomprehensible expression, Shen Yinuo gave them both a big eye roll.

Only Chu Xiaoming, a professional actor, asked very cooperatively: "Yes, why? I thought it was nothing before, but when you think about it carefully, it's a bit strange?"

"Yes, it is strange, but not strange either."

"Hey? Don't get around me. I hate this concept of both positive and negative meanings."

"No, this is not circumstantial. The reason why a broken teacup cannot reorganize itself is because the reorganization first violates the second law of thermodynamics, and this law can be expressed as the degree of disorder or entropy in any closed system always increases with time.

In other words, the fact that the cup is broken and cannot be restored is a form of Murphy's Law, and what Murphy's Law is about is..."

"Things are always getting worse! I know this!" Chu Xiaoming finally caught up with the rhythm.

"Yes, the continuous deepening from a highly ordered state to a disordered state is the core concept of Murphy's Law. A broken cup is a change from highly ordered objects to disorder, and what drives this change is the arrow of time."

"Hey? Isn't it your hand?" Chu Xiaoming was stunned.

Yan Sichen and Shen Yinuo were stunned, and both looked at this talent.

Xian Qianhua even burst into laughter.

Su Wanxia was also dumbfounded because he didn't know how to answer Chu Xiaoming's question.

Chu Xiaoming looked at several people innocently and said, "What? Did I say something wrong again?"

"Well... you are right. It was indeed me who pushed the cup down. But everything in the universe is affected by time. From when I decided to push down the cup to when I took action, and then to

The cup changes from order to disorder. This process proves the concept of the arrow of time. Is this clear?"

"Well...it's clear...but is this related to the problem we are facing now?"

"Yes, but it will take some time to verify."

"How to verify?" Chu Xiaoming realized at this moment that even if he followed Su Wanxia's train of thought, he still couldn't guess what he was going to do next.

Su Wanxia glanced at Yan Sichen intentionally or unintentionally, then pointed to the cup on the ground and said, "Let's see if it can be returned to the table."
To be continued...