Lin Xihui took the rope, then pulled out a short knife from his waist, carefully scraped it lightly on the wall, and scraped off a piece of the wall skin with red "spots" on the wall.

She told me that the red spots on the wall were only on the wall, not on the inside of the wall, so it certainly wouldn't be the material used in the construction or the traces of the mural. The red spots on the wall are very blurry, and if they were algae plants, as I said, they wouldn't show up in this way.

Because the distribution of algae plants should be in patches, not in dots, the possibility of algae plants is ruled out. And because the red spots on the wall are different shades of color, for example, the red spots on the lower part of the wall are more clear than the middle part, which may be the result of uneven distribution of blood splashes.

But Lin Xihui is not sure that the red spots on this wall must be bloodstains.

I told Lin Xihui that the best and easiest way to identify blood stains is to use "luminol".

Luminol is a synthetic organic compound known in chemistry as "3-aminophthaloylhydrazide". I use it occasionally in my daily work. Luminol can catalyze the decomposition of hydrogen peroxide through the iron contained in hemoglobin, so that hydrogen peroxide can be turned into water and monooxygen, and the monooxygenation of luminol can make it glow. This is also a commonly used method of identifying blood stains in criminal investigation.

After I finished speaking, Lin Xihui rarely looked at me with approving, and she continued, we don't have criminal investigation tools here, so we can only assume that the red spots here are bloodstains, and then consider every assumption that caused this situation, and then exclude the impossible part one by one, and the remaining possibilities that cannot be ruled out may be the original conditions for things to happen. Because we can't rule out the possibility of blood now, it is very likely that the blood stains will be the original condition on the wall. Lin Xihui called this method the "Helway selection method", which sounds a little similar to what we often call the analogy method.

As he spoke, Lin Xihui asked the bald head to hold the end of the rope and compare it to the other wall opposite this wall to see if there were any spots on the opposite wall that also resembled bloodstains.

The bald head took the rope, went to the opposite wall, and then lay on the wall and looked at it carefully for a while, and said to Lin Xihui, "Oh, Miss Lin, you are really a living Kongming, there are really red dots under this wall, which are clearer than the red dots we just saw." ”

After hearing this, Lin Xihui's expression became very serious, and she immediately asked the bald head to press the end of the rope tightly in the clearest position of the red dot. Then, Lin Xihui held the other end of the rope herself, pressed the rope in her hand near a red spot on the wall of ours, and then she slowly straightened the rope.

I asked Lin Xihui puzzled, how did she know that the opposite wall would also have red spots? And what is the rope used for in this way?

Lin Xihui sighed and said to me lightly, "I'm just verifying one of my guesses, and you'll know why later." Don't ask anything for now. ”

I saw her turn her head from time to time to look at the old cat crouching under the four-winged dragon wall, and I saw that the old cat was still staring at the mural in a daze, completely oblivious to what was going on here, and looked like she was out of the way.

"Come over and hold the side of the rope for me." Lin Xihui said to me suddenly.

I immediately took the rope from Lin Xihui's hand and pressed it against the wall. Lin Xihui walked to the diagonal back of the rope, sometimes looking sideways at the rope, sometimes squatting down or standing on tiptoe to look at the rope, looking at the rope from his own multiple angles. I wondered, what the hell was she trying to do? Does the rope have anything to do with the wall?

At this moment, Lin Xihui walked back to my side, and then she leaned against the wall and began to measure the distance between the two walls with her steps. It wasn't until she walked to the wall where the bald head was, that she walked along the wall, at a right angle, to my right-hand side, that is, the wall on the other side, the wall without murals, and then she began to look at the wall seriously, as if she was looking for something on the wall.

Team Zhang couldn't help but ask Lin Xihui what the hell was he doing? But Lin Xihui just made a silent gesture at him, and then looked for it on the wall.

We were trapped here, and the two people with the most "ability" in the team, one of them stared at a wall depicting Ying Long in a daze. The other, on the other hand, was looking for something on a wall with nothing depicted, which was also too bizarre. I really don't understand what is going on in their heads. I glanced at Team Zhang and the bald head, and the two of them also looked like monks who couldn't figure out the situation.

I greeted Team Zhang, who then walked up to me, and I asked Team Zhang if there was any way to get out of here now.

Team Zhang just spread his hands, signaling that there was nothing he could do at this time. According to our current situation, in his opinion, there is only one way to get us out of here, which is the kind I said before, blow up the walls here with **, and besides, unless there is something like a mechanism here, otherwise, we are afraid that it will be difficult for us to fly.

I looked around again, and at this time, it was more like a secret room, a secret room without doors and windows, and there was no "hole" above my head when we fell, and it was blocked by huge walls on all sides.

The bald man tried to hit the wall with a short knife, and then said to us, the walls here are all solid, and from the hardness of the wall, the wall here is not an ordinary wall, he used a tomb robbery term is "dead room", saying that we are now falling into a mechanism, the left and right of this mechanism, is to trap us here, the bald head finished speaking, and began to chatter and whisper complaining about the old cat.

At this time, Lin Xihui hurriedly walked over from the wall next to him, and said to us anxiously, "It seems that we can only risk blowing up this wall with **, otherwise, it won't be long before we think our blood will be left on the wall!" ”