The things in my brain are still those things, should it be tofu scum or tofu dregs, and I haven't learned anything advanced in the dialect during the time I was in the lion dancing base.

After all, on Teacher's Day last year, he felt that he had given back what he had learned as a gift......

But having said that, but in real terms, Fang Yan felt that everything he had done during this time was still very fulfilling, and his thinking began to be gradually opened during this period of time, not limited to this earth, nor limited to China.

Many people think that 13.7 billion light-years is the universe we can observe now, because the universe was only 13.7 billion years old, but in fact this is not the case.

The finite history of the universe, coupled with the finite speed of light, inevitably leads to the finite observable universe, but the farthest universe we can observe is not simply multiplied by the speed of light by the age of the universe, because it also has to be multiplied by a scale factor.

In cosmology, we call the distance after eliminating the influence of space expansion as the "coordinate distance", and the distance we see in the universe is called the co-moving distance, so as the name suggests, the co-moving distance is the distance at which the universe expands together.

In the universe dominated by matter, the scale factor is proportional to 2/3 of time, if you multiply the Hubble distance by this scale factor, and then calculate along the time integral, the distance obtained is about 46 billion light years, that is, we can now see the horizon of the universe.

The Earth is very large, and the Earth is just a speck of dust in comparison, or perhaps more like an atom, or even a quark......

So when Fang Yan looked at the night sky again, what he could see, or what he could imagine, was very different from before, as if he was looking at the night sky now, but his heart was full of complaints,

Doesn't it mean that the weather is sunny and the visibility is high, what does this black oppressive piece mean, the stars and the moon are blocked......

Fang Yan thought, then lowered his head again, and honestly walked towards where he was supposed to go, where he had to go once a month, and stayed for three hours at a time.

"Tongues, morning!"

"Tongues, how do you feel?"

The people next to him came with greetings from time to time, and Fang Yan kept waving in response, but there was not much smile on his face, just like the clouds in the sky covering the stars, and his heart seemed to be faintly suppressed by something.

Could it be that there will be a catastrophe for me to cross this time?

Fang Yan thought, and then silently moved his fingers, but did not come up with any results, he looked at everything around him serious and nervous, slowly exhaled, kept inhaling, exhaling, and finally spit out part of the boredom in his heart.

"Dialect, come and drink some water and eat something."

Yan Hongchang sat at a table and shouted, then untied the lid that was still shrouded on it, and after a burst of steaming, the fragrance slowly came, but the dialect still didn't have any appetite.

"What's wrong? Not happy? Yan Hongchang looked at the silent dialect and asked.

"I don't know what the situation is, but it's okay, but I can't raise the interest, and I guess it's at a low ebb of emotions." Fang Yan said, exhaled again, and then looked at the white mist under the strong light, and slowly picked up the chopsticks.

"Didn't your right eyelid jump, didn't your right eyelid jump a lot when you were in Atlantis?" Yan Hongchang asked softly.

"No, there shouldn't be any big deal." Fang Yan said, looking at this rich breakfast at half past three in the morning, he sandwiched something light, and then ate it directly with the gruel.

"Pay attention, we'll give you a year-end bonus when you come back, and then go home happily for the New Year." Yan Hongchang opened his mouth and said, trying to mobilize the emotions of the dialect.

"Hmm!" Fang Yan replied in a low voice, then nodded lightly, looked at the bright light not far away and was silently stunned, and then turned his head to look at the night sky above that was shrouded in clouds, and finally took the initiative to speak, "Old Yan, I think, this time it's a bit hanging." ”

"What's that, what's in mind?" Yan Hongchang asked.

"Look, the clouds are thick, according to metaphysics, something big must happen!" Fang Yan nodded, looked at Yan Hongchang and continued, "Isn't it written on that document, World War III is still the next future scenario that I can easily travel to, and I think this time it is estimated that I will almost reach the center of the front-line battlefield." ”

"Isn't there still ancient times, and besides, you think it's so easy in the center of the battlefield, and the earth is so big." Yan Hongchang waved his hand and objected.

"I'm not sure what the Ice Age, the Triassic, when life on Earth began to sprout, but according to the previous rules, it is most likely that I will travel to ancient times this time." The dialect continued.

"Be cheerful, relax your mind, the earth is so big, the universe is so big, maybe you can't teach aliens to speak Mandarin, right? When the time comes, the whole universe will speak Mandarin. Yan Hongchang said with a smile.

"This is reasonable, and maybe it is really possible in the future." Fang Yan also had a smile on his face, then looked at the countdown next to him, and said, "It's almost time, it's time for me to go, remember to prepare a big red envelope for the New Year!" ”

"No problem!" Yan Hongchang replied affirmatively, and then raised his hand, the same gesture that he would make every time he crossed, and slowly gave his thumbs up to the dialect......

“3！” “2！” “1！” “0！”

The countdown on the electronic clock cleared in an instant, and then returned to 0:00 on the 31st day, continuing to count down, and the dialect also disappeared in an instant, and went to the unknown time and space again......

……

"Environmental monitoring anomaly, gravity anomaly, air anomaly, the five-hour program is the 0th program sequence!"

"Satellites can't connect, communications can't connect!"

"Currently in location, searching......"

"No need ......"

In a word, Nuwa's voice sounded softly in Nuwa's alarm, and then slowly stopped, but there was still a non-stop attempt in the background......

Fang Yan tried to move his hand, then tried to move his leg slightly, and a faint smile appeared on his face, and then slowly stopped.

"There's no solution, right?" Fang Yan asked softly, but received no response, he smiled, then exhaled a long breath, took a deep look at the scene ahead, and slowly closed his eyes with a comfortable smile.

When you are outside the Earth, take a look at the Earth next to you......