In order to save power, Zi Yang and the others turned the lights to the darkest. From a distance, three tiny highlights moved slowly in the boundless darkness like fireflies. As they walked, Lao Wang knelt on the ground with a thud, "No, I really can't walk anymore, I'm so tired!"

"Let's have a rest!" Zi Yang was also exhausted and fought against the two.

More than twenty hours have passed since Qin Xianghe detonated the explosives. Lao Wang, Zi Yang and Su Rui and the other two were wading through the "mountain" in the dark and twisty underground maze. They can't remember how many waterways they passed and how many times they climbed.

Su Rui sat on the ground, took out an energy bar from his bag and handed it to Zi Yang: "The last one is here."

Zi Yang carefully broke the energy bar into three sections and divided it into one piece by himself. Lao Wang took the portion he had stuffed into his mouth and swallowed it almost without even chewing it.

Zi Yang put his piece in his mouth and chewed it slowly. After chewing, he carefully rinsed the gaps between his teeth with the tip of his tongue, trying not to waste a little residue.

After eating this energy bar, they were really out of ammunition and food.

"Are we going the wrong way? I feel like we've been walking for most of the day, and it seems we've been going around the ground." Zi Yang's confidence began to shake.

Lao Wang also said, "That's right, I've walked at least a few hundred kilometers, why can't I see the end? If I continue, I can't even walk through the earth!"

Zi Yang knew that hundreds of kilometers were a bit exaggerated, but there were still one or twenty kilometers.

The two looked at Su Rui together, wondering what this genius beauty thinks about the current dilemma.

Su Rui murmured with her knees holding her hands, "I didn't expect this underground cave to be so complicated. What I am worried about now is not that there is no exit, but that we have entered the 'Mobius belt'."

"What five are you bringing?" Lao Wang asked weakly on the ground.

"The Mobius belt is a physical model. German mathematician Mobius discovered that after twisting a strip of paper by 180°, connecting the two ends into a strip circle will produce a magical effect. If a small insect is placed on it and let it walk along the strip, it will never end."

"What does it mean? I didn't understand." Lao Wang was confused with his two ignorant eyes.

Su Rui drew a three-dimensional figure on the ground: "Ordinary strips have bilateral curved surfaces, one front and one reverse side. The front and back sides of the Mobius belt are on one side - or it only has one side. When the bug walks on it, they will only repeat the cycle, but they will never touch the end - the Mobius ring has no end."

Zi Yang took a breath of air conditioning, "I understand, what do you mean is this underground maze is a Mobius belt, we are the little bugs walking inside?"

Su Rui nodded seriously.

Lao Wang turned over and said, "I don't believe that there will be a road in this world that cannot be reached. What a broken ring! Just poke a hole with a pen, but why are you still going around? Why do you have to do so much trouble?"

Zi Yang sighed: "Do you think you are a pile driver? Do you have the strength of the Overlord Salamander?"

Lao Wang tilted his head and thought for a while. He really didn't have the strength. He held his head with both hands and said distressedly: "Is that the end? Xiao Su, think of a solution, aren't you a genius?"

Zi Yang also looked at Su Rui with hope.

Su Rui hesitated and said, "There is no way. Now we have several options: the first one is to cross the border of the Mobius belt."

"How to cross?"

"As Lao Wang said, we directly destroyed the Mobius belt. However, we do not have the appropriate tools, so this is difficult to do."

Lao Wang sighed and said, "Xiao Su, it's already here, so let's not popularize knowledge. Just tell me how to get out of this circle."

Suri continued: "From the physical concept, there is a most direct way to go out and find where the Mobius ring begins."

The question is where is the beginning? There is no street sign here! Zi Yang thought sadly.

Lao Wang lowered his head and thought for a while, his eyes suddenly lit up: "I know where it is! It's where the Overlord Salamander broke through the wall, right?"

Su Rui nodded: "I also doubt it is there, but I'm not sure."

Zi Yang said dejectedly: "Don't think about it. Even if there is the beginning, the question is, can we still find the way back? Even if we remember the way, will we still have the energy to walk back?"

The three of them looked at each other, and it was obvious that the answer was no.

"Xiao Su, Xiao Su, think about it quickly, is there any other possibility?" Old Wang squatted beside Su Rui and asked anxiously.

"There is another possibility: this ground ring is not closed, there are other ways out."

"Absolutely? Don't coax me, Lao Wang, toss for a long time. I really can't hold on for that long. This submersible is so sank to death at least a few hundred kilograms..."

"Stay moving forward, at least we haven't encountered a repetitive path yet, right?" Su Rui gave Lao Wang an encouraging look.

Zi Yang knew that they had actually gone back or not, and most roads were similar in the dark underground space. However, it would be better to put such despair in the heart, as it would be too harmful to say it.

The three of them raised their spirits and staggered forward in the narrow and slender gaps. Zi Yang looked up and looked up. The crack became narrower and narrower, as if there was no end at a glance.

"There's no electricity! Grass!" Lao Wang patted the diving light on his head, and the diving light on Zi Yang's hand gradually turned yellow and dimmed.

Su Rui turned the mine lamp on his hand to a gentle brightness, barely illuminating the surroundings, and the three of them walked with one foot deep and one foot shallow.

"Ouch!" Lao Wang suddenly exclaimed, and fell to the ground with his back on his back. Because there was a heavy respirator on his back, Lao Wang was like a turtle who was on the ground with his back, pulling his hands and kicking his legs, but he didn't get up for a moment.

Zi Yang hurried forward to help him, but his feet slipped and he fell down.

Zi Yang felt that he felt a layer of sticky things on the ground with his hands. When he saw it, he saw it as a black thing as mud.

"Have you stepped on oil?" Lao Wang finally turned over and said to Zi Yang. His hands were also covered with black "silt".

Su Rui leaned over and smelled it and said, "No, it's animal feces."

"Baohai!" Lao Wang and Zi Yang hurriedly wiped the feces on each other's body. The hands were wiped clean, but they were covered in mess.

"Grass, what's the thing that makes such a large piece of shit?" Lao Wang cursed, and under the light, you could see a layer of black feces on the ground.

"What you should care about is how this thing is pulled!" As soon as Zi Yang said, the three of them looked up together. Thin traces of shit were scattered on the rock wall.

Su Rui twisted the brightness of the mine lamp to the highest level, and you could vaguely see something squirming at dozens of meters above.

"Baocao!" Lao Wang sighed again, the thing on it seemed to be alarmed, and suddenly rushed down with a shout!

"My mother!" Old Wang shouted loudly and ran away with his head in his arms. Su Rui and Zi Yang followed behind and ran for no reason. All he could hear was the huge black shadow making a thumping sound on his head, as if it was colliding on the rock wall.

Fortunately, the crack was relatively narrow, and the mysterious creature seemed to be unable to move in this small space and could not catch up with them for a while. The three of them ran away with their heads and finally rushed out of the crack, and an open area appeared in front of them.

The three of them lay on the ground panting, feeling difficulty breathing, and their legs were sore and swollen. This sprint took a lot of energy and they could no longer run.

Fortunately, the monster did not chase out of the crack of the rock, and seemed to be stuck in a certain position inside. Everyone could only hear a clamor from the huge crack, as if the stones in the crack of the rock were knocked down.

"Oh, Damn, I really want to run away again. I can't run anymore. I might as well die. Let's die here!" Zi Yang said weakly on the ground, feeling his heart beating like a drum, and the stars in front of him were running around, and his temples seemed to be hit by someone with a small hammer.

"I think, how easy is it to die? What if the monster catches you and raises you and eats you bit by bit..." Lao Wang was just talking, suddenly a strong wind from his head pressed down. The three of them breathed stuttering, and a huge black shadow claw had already landed behind Zi Yang, and he grabbed him.

After the monster caught Zi Yang, it flew up. Lao Wang and Su Rui were sore about the strong wind blowing out of its wings. Zi Yang's body was instantly carried up by about ten meters. Lao Wang was in a hurry and didn't care about anything else. He took out the dog-legged scimitar on his waist and threw it over.

The heavy dog-legged scimitar drew an arc in the air, and pierced it into the monster's chest without any bias. The monster screamed shrillly, left Zi Yang and flew out more than ten meters, hitting the mountain wall next to it and rolling down.

Su Rui rushed forward to help Zi Yang who was landing on the ground and asked anxiously: "You, are you okay?"

Zi Yang fell from the air about ten meters and was dizzy when he fell. He said in anger: "He, why is it that I am unlucky again? Who am I provoking whom I am? I'm messing with me every day! Why am I so depressed?"

Lao Wang ran to the place where the monster fell and saw that the huge troll monster had broken its wings, its neck was folded, and its bones were exposed. The dog-legged scimitar was embedded deep in its chest. Lao Wang couldn't help but secretly praised: I am really a heroic martial artsman, and it's so accurate with just a swing.

Seeing that the monster's chest and abdomen seemed to be undulating slightly, Lao Wang pulled out the dog-legged scimitar and stabbed it in a mess. After confirming that the monster was completely extinguished, he ran back excitedly and shouted to Zi Yang and Su Rui: "I have meat and eat meat and eat it. I will kill a big bat!"

Zi Yang and Su Rui looked at each other: Big bat? What kind of bat can catch people worth tens of kilograms in the air?

Su Rui helped Zi Yang to the corpse of the flying monster, and carefully illuminated it with the mine lamp and couldn't help but be surprised: This is not a bat, it's obviously a gargoyle!
Chapter completed!