Su Xin and Xiao Xiaoqin both knew that behind that door, it was another world, so the two of them had a discussion about the door in front of them, Xiao Xiaoqin is known for being rigorous, but she will also have the defects of being rigorous, she has already wanted to rush over to find out, but the restraint of consciousness has been making her hesitate, until Su Xin said such a paragraph......

"Just now we judged that outside the stone wall corresponding to this door is the location of Lin Yao and Yanjiu, but we don't know the topography of their side, but fortunately they are safe, but there are four walls here, if my left hand side is the door, the right hand side over the wall is where Lin Yao is located, and the top of my front is a hole that is not low or very high, fortunately we both slipped down with the sand, otherwise it would have fallen very badly, then there are only two directions left in front of me and behind, I can roughly judge that the top of the front should be the top of another tomb, and its top should be similar to the dome roof, so we will slide down here, so the tomb in front of me should be intact, but the tomb in front of me should be sealed, and we still can't get out, because it is higher from the exit, and it is more difficult to go up. ”

"Then there is only the tomb behind me, judging by common sense, only this side of the tomb is the most prone to bad pools," Before Su Xin's words were finished, Xiao Xiaoqin couldn't help but interject: "It seems that something is wrong with Su Xin, just now you said that Yan Jiu's side is currently safe, but why is this talking about the tomb behind him is very dangerous?" Isn't the burial chamber outside the door on our left hand side dangerous? And why isn't the burial chamber in front of it dangerous? ”

Xiao Xiaoqin She is very smart, but such a smart person didn't understand Su Xin's words, which can only show that Xiao Xiaoqin's experience is not enough for Su Xin, so Su Xin had to tell her her her analysis, she said: "Xiaoqin, have you heard of game probability?" ”

"Probability has heard of it, is it true that Su Xin is right...... Coat! I see, "Xiao Xiaoqin was suddenly awakened by Su Xin, in fact, Su Xin divided the tomb he was in into a nine-square grid according to the plane, but this is not the case, after the plane is divided into nine-square grids, it will be divided up and down, so if Lin Yao's side is dangerous, Su Xin will rule out that the front is dangerous, so Xiao Xiaoqin must ask Su Xin why he will eliminate the danger in front?

In fact, one is because of the direction of the tomb, but Su Xin does not know the direction of the tomb, so it is impossible to determine at all, so there is also the easiest way, which is the dome top that Su Xin said, it can be seen that the tomb over there is lower than the tomb here, that is to say, they slipped from the top of the tomb over there.

However, in the tomb, the higher the high-rise tomb, the higher the danger will be, because there are many traps and so on in the high-rise tomb and the main tomb, and the higher-rise tomb building is very easy to be corroded by rainwater, just like the tomb where Su Xin and Xiao Xiaoqin are located, there are holes in the wall, but this is all common sense speculation, and you can't bet on your own life and death, after this ancient city sinks under the sand, it is inevitable that it will be damaged, and it is estimated that so many large and small holes are gradually formed from that period, However, the problem of corrosion can be eliminated in the desert, but the underground river has to be prevented.

It is precisely because the tomb is not as high as this tomb, so Su Xin thinks it is safe for the time being, and knows that whether it is a city or a good thing, the bigger and taller the thing or a building, the greater the damage, on the contrary, those small tombs or stone chambers, the damage will be very small, the simple stability principle, she also understands Xiao Xiaoqin, but Xiao Xiaoqin is so smart, she still can't be like Su Xin, she can finish the nine-square grid in a while, and it is still a three-dimensional palace grid, The calculated data can be imagined, but Su Xin thinks that those are simple common sense problems, that is, his so-called elimination method, which is a method to eliminate little by little and minimize the probability.

At this time, it was the most critical time for Su Xin to speak, Xiao Xiaoqin still trusted Su Xin very much, and thought that what Su Xin had just said was indeed very reasonable, so she ventured to the door and listened to it: "This door is actually made of wood, and it doesn't seem to be heavy, but Su Xin, you see, it can be that it has not corroded for so many years, which shows that it is not made of simple wood." ”

Su Xin also has disadvantages, she has a good mind but is surprisingly small, she can judge that there is nothing to do over there, but her little courage has already told her that she can't get by, if it weren't for Xiao Xiaoqin to speak, I'm afraid she wouldn't dare to go over there, seeing Su Xin's boldness, she just nodded, and hummed, and heard Xiao Xiaoqin say: "Su Xin, you don't understand witchcraft, you stand back, if there is a trap here, it's good to have time to dodge, I'll push the door first to test it!" ”

Xiao Xiaoqin raised her vigilance, and also took a deep breath, and looked back to see that Su Xin had already run far away, if it weren't for a beam of light shining towards the door, Xiao Xiaoqin really didn't know where Su Xin was hiding, at this time Xiao Xiaoqin thought to herself, why did Su Xin run so fast, didn't she say that there was no danger here? Think about it again or forget it! Now trapped in the tomb, I always have to find a way to save myself, I think that the spell is very strong, I am not afraid when I am here, not to mention that Su Xin is a girl without spells!

Xiao Xiaoqin, who came back to her senses, was engrossed, she pushed hard, followed by a burst of sand slipping, and she was all over her body, Su Xin heard the sound of baba from afar, and thought that the situation over there was not very good, so Su Xin ran out in a hurry, she began to ask about Xiaoqin's condition, and there was a burst of coughing, only to hear Xiaoqin say: "Su Xin, I'm fine!" There were a lot of grains of sand sliding down the tomb door, and I was covered in them. ”

Xiao Xiaoqin seemed to complain a little, and then heard Su Xin ask, "Do you see what's going on over there?" ”

It wasn't until the dust had passed that Xiao Xiaoqin looked up, but this scene disappointed her, the wooden door didn't move, and she couldn't help but hear her say to herself: "Obviously, the wooden door is not heavy, why hasn't it moved?" Could it be that there is something blocking the wooden door? ”

Su Xin didn't know what Xiao Xiaoqin said to herself, so she ran over to check, but Xiao Xiaoqin had already taken action, before she saw that her hands touched the wooden door and there was no adverse reaction, and there was no trap, this will also be bolder, they all know that the strength of girls is many and very small, but girls who understand witchcraft, their strength will not be much greater, but it is only witchcraft, but there is a precedent for using a witch book to hit a door, and it is also because there is a mantra on the door. It is also necessary to use spells in order to break the spell, but there is still a danger of doing so, the strength and weakness of the spell are immeasurable, it is very likely that the heavier shot will accidentally cause heavy damage to this place, then this place will not become the grave of Xiao Xiaoqin and Su Xin, thinking that Xiao Xiaoqin will not be so similar, but under the strength of both hands, there will always be a place with great strength, seeing that one of them dodged and jumped, Su Xin covered his eyes with both hands, and a burst of sand slid down, this time Su Xin was not spared, and was also harmed by Xiao Xiaoqin.

Su Xin shook the little head, and then patted his clothes, and Xiao Xiaoqin, who was embarrassed, said, "It's strange! Why can't I open it? ”

Xiao Xiaoqin is the first time to go to the tomb, but this is not a tomb, but after the ancient city sinks into the sand, it is also very similar to the tomb, many tombs are built according to the palace, etc., and the deeper the tomb, the more respected the status of the tomb owner, but where is the real sense of the tomb! This is obviously an underground palace, although the wooden door in the palace is strong, it has not been corroded for many years, but there are undoubtedly only two ways to open the door, seeing Su Xin stepped forward to help Xiaoqin pat the dust, and then came to the door to take a look, and saw that there was indeed a wooden wedge under the door, only to find that there was indeed a mechanism there, it seems that this is also the ingenious design of the ancients, as long as the door is closed, the mechanism will lock the door.

Su Xin Judging from the design of the mechanism, if you go out of this door, then someone must open the door inside, otherwise you will not be able to enter this door again, maybe this is the legendary return door.

However, this door still has some origins, the door can be opened from the inside, but the door can not be opened from the outside, at least it can block people from outside from entering this tomb, and at the same time you can also go out from this door, and then escape, but the door is not only used here in that period, the door is also a place to escape from the war, since ancient times, there has been a saying, once you meet the door, you must withdraw the word, this word is also the meaning of home, there is not one door, many and are three or five ways, And in this way, we can distinguish whether it is a return door, and at the same time, we can also identify the power of the people in the return door.

The people inside the door can open the door, and the people outside the door can't enter, so there will be such a saying, that is, I have gone home, back to a safe place, can the people outside you leave me a face, saying that let me go today, and the next day will be a spring of retribution.

This is the origin of the return door, but the well-informed Su Xin is also very puzzled, since this is the return door, then the tomb where he and Xiaoqin are located should belong to the refuge, that is, the person who escaped has to run in from several back doors, and close the doors one by one, usually these doors should still have mechanisms, it will not close, so this three sides of the tomb are bluestone brick walls, but it can also explain everything, but the people who return to the door today, do they have to wait here for death?

Although Su Xin said that he knew about returning to the door, he had never seen miscellaneous books about the aftermath of returning to the door, so Su Xin thought that according to his own analysis, there should be something here, and it would not be so empty, unless there was another mystery in it......