The second day we met my uncle was also the fifth day we went into the desert.

The monkey's condition improved and he was basically able to walk on his own, but his pace was a little slower.

Our group followed behind my uncle, looking for a way out. According to what my uncle said, this stone rock seems to be distributed very far from each other from the outside, but in fact, it is not the case, it is easy to get in, but it is difficult to get out.

At first, I didn't believe it. While everyone was resting, I tried to walk towards the exit I saw, but as I walked, I noticed that a rock suddenly appeared in front of Ben's endless sky, blocking the way. This stone rock seems to appear out of thin air, and later I heard my uncle explain that the density of this sand is relatively large, coupled with such a peculiar geographical environment, caused the surrounding stone and rock to change its position, and it appears from time to time.

The food and water gradually became scarce, and although everyone felt that the danger was getting closer and closer, they were surprisingly calm, and I wonder if they had experienced many such scenes.

When it was time for the seventh day, when the monkey had almost recovered, the old man walked up to the monkey, patted him on the shoulder, and then gave the camel a look.

The camel motioned for me to follow him, and I followed him, and we came straight to the bottom of a rock. The old uncle took Zhang Yu and the monkey over, and the little K and the big man walked under a stone rock opposite, and the difference between the two stone rocks was not very far, only twenty or thirty meters.

The old uncle gave Zhang Yu a look, Zhang Yu understood, looked at the top of the stone rock, tied a section of the steel cable to his waist, jumped over, and jumped to the top of the stone rock in three times and five times. Then the monkey jumped up, and I followed the monkey with a sledgehammer and a stone nail, and every time the monkey took a step, I gave him the sledgehammer and the stone nail, and then I took another step, and so, although it was slow, the monkey and I still reached the top of the rock safely.

Zhang Yu seemed to be unable to wait, and after seeing the big hammer and steel nails, he held the steel nails with one hand, and the other picked up the big hammer and hung down. After the steel nails were deeply embedded in the rock, the monkey and Zhang Yu began to wrap the steel cables around the steel nails, and in order to ensure stability, several more steel nails were reinforced.

After the uncle below saw our ok gesture, he waved his hand at the big guy, and the big guy hurriedly ran over, because the time was urgent, this stone rock would disappear out of thin air and appear out of thin air at any time because of the refraction of light, maybe the next second, there was a stone rock in front of the big guy and the little k in front of him.

The big man ran to his uncle, picked up the steel cable on the ground and wrapped it around his waist, and began to run towards Xiao K, and when he ran to the opposite stone rock. The big man is in the shape of a bow, and his hands are rigidly pulling the steel cable to ensure its linearity and stability.

Seeing that it was almost there, the monkey took off his coat, spread it on the steel cable, grabbed the sleeves of each side of the coat with both hands, and began to slide down with his body half-crouched, his face facing the stone wall.

Bang!

I fell five meters from the ground, but because the ground was full of sand, I was fine. I was about to throw the sledgehammer down, but Zhang Yu stopped it, saying that it was useful to stay here, and there was still one in the camel, and I only needed to take the steel nails away. Although I had some doubts, I still went down with Zhang Yu one after another.

When my uncle saw that we had come down, he began to repeat his old trick again, so that after half an hour we succeeded in erecting a straight steel cable on the two rocks.

Just as he was about to rest, a gust of wind and sand hit again. We hurriedly hid under the rocks. When the wind and sand disappeared, I opened my mouth wide in shock, the stone rock opposite us was gone, but our steel rope was still wrapped around it, hanging high in the air, which was very dazzling.

By the evening, we had erected more than a dozen such steel cables, but because the steel cables were limited after all, and everyone's physical strength was too much, so we stopped.

I still didn't understand what I did today, and I asked the monkey during the period, and the monkey just replied indifferently, "Little Ke Ye, we just have to do what Chuan Ye ordered, Chuan Ye must be reasonable."

I don't know if it's because my uncle deliberately formed a circle at night to dispel the doubts in our hearts, and began to explain the reason to me.

Uncle assumes that the Shadow City we are staying in is a circle with a radius of more than 200 meters, and that we are at any point within this circle. Because this shadow city, which is what we assume to be a circle, has a certain range limit. If we keep going and don't encounter any surprises, we might be able to get out in half a day. But now, we have encountered a thorny problem, that is, due to the special location of the buried here, the refraction of light makes some rocks flicker, causing the judgment of our orientation to be misaligned, maybe we have always thought that we are going north, but in fact we are going in circles. The connection between the steel cables is carried out above the two rocks, and that is to ensure that the route is not repeated, giving itself a position. Erecting the steel cable is the first step, and removing the steel cable is the second step. Because the steel cable is limited after all, it is necessary to have a steel rope master monkey and Feixia Zhang Yu to complete the task of dismantling the steel cable, which is also the reason why the uncle can't wait to do it as soon as the monkey recovers.

I listened to it with a little understanding, and I couldn't help but feel admiration for my uncle. As I understand it, the distance between the diameters of a circle is the smallest, and we are now stuck in tens of thousands of diameters. In calculus, we can explain it this way, taking a very small distance and letting it be dx. Our distance from the exit can be expressed as s=∮ndx.

I was half-lying on the ground and thinking, Zhang Yu patted me and asked me to dismantle the tightrope with them, and the monkey walked in front, with only a pair of pliers pinned to his waist. The monkey motioned for the two of us to stop, and he himself leaned on the suspended steel cable in the air, ran to the stone wall behind and began to pry open the steel nails, and we rolled up the steel cable. In this way, we started from the very end to the very front, step by step, so to speak, and of course the monkey was the hardest, and he had one more step than us, that is, he had to pry open the rope and then try to return to join us.

After about three hours of work, we finally got it done, took a slight break for two hours, and it was dawn. Due to the limited water, we don't dare to delay, and if we continue like this, we will definitely be able to get out of Shadow City.

By the morning of the ninth day, we finally saw that there were no rocks in front of us, and we were sure that we had come out.

I let out a big breath, and I felt like I was dead and alive. But in the face of the boundless desert, the old man still frowned.

;