The crack showed the appearance of a door, and then slowly retreated to open to both sides, revealing a somewhat dim passage, it was not clear what was going on inside, but it was so quiet that it was creepy, and even the door opened without the slightest sound, and the dim passage was like a tombway.

(When I think about it, the whole building is clasped like an eggshell, and when it is uplifted, it is a tomb, so I almost have a monument in front of it.) ）

When he arrived at the door, it was a little unreasonable to retreat, Wu Zixi didn't have anything to think about, he raised his legs and walked in, and the dim passage rose some light with Wu Zixi's entry, and he couldn't see the light source, but it made people see everything in the passage clearly.

The passage seems to be fifty or sixty meters long, which is actually almost the length of the building that Wu Zixi saw outside.

The passage is just over a meter, less than two meters wide, and has a very rounded arch, just looking at the appearance, it looks like an ordinary wall. As far as the eye can see, there are all kinds of murals along the passage, in addition to a large number of narrative descriptions, there are also a lot of words, but these words Wu Zixi can't understand at all, if he relies on his brain power to analyze, I'm afraid the time it will take will be very terrifying.

Therefore, Wu Zixi simply gave up on interpreting these words, and symbolically passed over these murals, although some of them are jerky and difficult to understand, but most of them are describing a similar story.

The main characters of these murals are a group of life forms that are roughly the same shape as human beings, and the murals represent this group of people in a shape similar to that of a spacesuit, they come from a pitch-black door, which hangs in the starry sky, and I don't know if the stars are to embellish the mural, or to contrast the door, if it is the latter, then this door is probably so big that it is shocking.

There seemed to be quite a few of them, and one by one the shuttle-shaped flying machines appeared through the door, almost obscuring the starry sky, and arrived on the planet. Here, the mural depicts the composition of the galaxy in which the planet is located, and the third star of the same galaxy, except that there is no Earth-Moon system, and it has become a planet in the asteroid belt, which is a replica of the solar system.

(Coincidence?) Or is this the solar system? The solar system hundreds of millions of years ago? ）

The mural at the back describes the transformation of the planet by this alien civilization, from the climate temperature, to the proportion of land and sea level, and even the sowing of life, how long they stayed on this planet, the mural does not specifically describe it, but this time must be very long, so long that this alien civilization can not bear it, and begins to leave in batches, until only the last few observers who remain to continue to observe the growth of this planet.

Then, the whole style of the mural changed, and those who left this civilization seemed to have encountered another civilization, and there was a protracted war with it, the cause of the war, the course of the war, and even the result were not described, but for a long, long time after that, no one from that civilization came back on this planet, and the observers who stayed behind also disappeared one by one with the passage of time.

It is said that it disappears because there are thousands of expressions of death, but the murals are replaced by dotted lines, and every time many people of this civilization suddenly become dotted lines, in the next mural, these people do not appear, so Wu Zixi feels that it should not mean death, but some other meaning, such as return.

The mural came to an abrupt end here, and there was a large blank space behind it, although there were still many words occasionally, but the picture never appeared again, until Wu Zixi was about to come to an end, and a strange half-finished product appeared.

It is said that it is a mural, at most it is a semi-finished product, except for a simple outline, not to mention the color, the composition of the picture is very confusing. This semi-finished mural seems to be a geomorphological description of an area, with an oval building in the center being the most obvious, and a number of strange buildings scattered around it, but only the oval building has been cut.

The section shows that the oval building is supposed to be a structure of more than ten floors, and there is a sphere on the top of it that has been deliberately marked with several symbols, and it is unknown what it means.

(So, is this civilization the first civilization after all?) What about another civilization? As a result of the war, since they are all murals, can't you tell the story completely with such a long scroll? Oh...... Maybe those words are supplements, but I don't know TM either. ）

(Is it possible that the people of the civilization that became the dotted line are dead, or what happened, and since they entered this world through a door, is it possible that they also returned to their original world by some means.) ）

(etc....... Door...... When my world was invaded, there were countless doors in the videos that remained, and those aliens appeared from those doors, is there any connection between the two? ）

Thinking about it, the oval building in the last half-finished mural should be the one he is in now, Wu Zixi wrote down the section of the eggshell building, and estimated that he still had to explore this building.

After walking through this passage, Wu Zixi was surprised to find that there was a hall at the end of the passage, which covered an area of at least four or five hundred square meters, and with the distance of the passage, it was already out of the scope of this building.

(Could it be that the passage just turned a corner?) It's obviously straight, or is it some kind of high-tech used here, and the space is folded? Also, the building in the mural has more than ten floors, could it be that this building is the same as my cemetery, dug down? ）

This hall is empty and circular, in addition to the passage of Wu Zixilai, there are more than a dozen passages evenly spread in all directions, just like the sun, which may also be an artistic design.

In the center of the hall there was a lonely round table, pure white, which looked very conspicuous, and there seemed to be something on the table, what seemed to be a book.

After a little observation left and right, Wu Zixi walked straight over, and when he got closer, he found that the table was indeed a book with a black cover, about a palm thick, ordinary paper, without any words on the cover, including this table, the whole building was spotless.

(What's the case with this, that this civilization also has a creation like a book?) Is it because of the unity of the world? There will be such a stage in the evolution of all life? ）

For this book, Wu Zixi did not rush to turn it over, after all, dog paws are not suitable for this kind of thing, he first circled around the table, and sure enough, he saw a symbol on the side of the table, he was about to stretch out his paw to touch it, but was stopped by a piercing roar.