Xiaoya's voice came from his ears, but Xie Fei was not very excited after hearing it. "Does it matter? We still can't get out anyway."

"As long as you persist, there will be hope. I believe in you."

"You think so highly of me, I don't even believe in myself." After Xie Fei finished speaking, he leaned against the wall again. He was thinking about Xiaoya's words, 'Believe me, but is it useful to believe in me?'

"What should we do now?" Old Wu asked

"Don't look at me, I can't help it. Unless our boss Xie can find an exit, we will all starve to death in this cave."

"Don't count on me. I don't have the ability. What will happen if I just try so hard to find it? You can still promise me your life."

"Are you telling the truth?" Xiaoya lowered her head and whispered in Xie Fei's ear. Her warm breath blew on his ear, making Xie Fei feel very itchy. In fact, Xie Fei regretted it as soon as he said it.

Yes, it's completely unintentional. Besides, is it easy for me to keep my integrity for so many years? If I really let her commit myself to him, I don't know who will suffer.

"We'll talk about it after we get out." Xie Fei quickly changed the subject, "If I can find the lowest point of the cave, I believe I can find a way out."

"Find the lowest point of the cave?" Lao Wu said and had already reached the wall. He was holding an oil lamp and kept searching on the wall, looking quite funny.

"Stop looking, the lowest point of the cave must be over there." Xie Fei pointed.

"But it was dug over there by people, so why did it turn into a cave again?"

Xie Fei had an idea in his mind. Old Wu's brain and cerebellum must have grown in the wrong position, otherwise he wouldn't be so stupid. "The artificial excavation is just an illusion of this passage. Once the cave is here, it will not be as good as before."

It’s so wide that we dug this distance purely manually, but I’m not sure where the end point of this cave is. If we find it, we’ll be saved. If we can’t find it, we can only wait to die.”

"Okay, you can rest for a while." Old Wu and I asked. After saying that, Xiaoya got up from the ground and walked to the wall in front of Old Wu. She still held an egg-shaped stone in her hand and kept knocking on it.

against the wall.

Xie Fei followed Xiaoya's words and rested against the wall, but his mind was not idle. Now that he had overturned Xiaoya's statement that the passage was stacked, he assumed that what he thought was correct, that the passage was like a snake.

Like a snake, Xie Fei's eyes flashed suddenly, and the snake in his head suddenly opened its bright red mouth and bit his tail, and the whole coil

Connected end to end, one link within another.

"I know." Xie Fei said excitedly

"Have you found the exit?" Xiaoya turned around and asked, with an unstoppable smile on her face.

"No, but I know what mechanism this passage is."

"What."

"Jiulianhuan, there was a very powerful old man in the place where I used to live. I once heard him say that when he was young, he robbed tombs with others, but he happened to get trapped in a tomb passage. He had no food for three days and three nights.

At first, they thought they were bewitched by ghosts, so they walked forward and backward in the corridor, but it had no effect at all. Just when they thought there was no hope, someone happened to find the exit...

"

"If you say it, you haven't said it yet."

"Then how did they find the exit?" Xiaoya asked

"I don't know that either, and he didn't tell me either. He just said that this mechanism is called Jiu Lian Lian."

"Nine-chain rings, tsk-tsk... I know about the nine-chain rings. I heard that Zhuge Liang invented them when he was trying to pick up girls. He said they are also my idols." Old Wu suddenly remembered an incident in his junior high school.

At that time, the history teacher talked about the Trojan and said that the Trojan has been lost, but I don’t believe that this evil has been lost? I will take it out for you even if it is under the door, and you can go home and look up Cui Yuan’s information.

Water Trojan didn't see it, but he happened to see a design drawing of a nine-ring chain in the book. Yes, he was also a good boy wearing a red scarf and a big red flower. He just made one of these drawings. That time he really shined.

Ah, the happy teacher kept praising himself for being smart, and even the history class representative told him privately that he had a crush on him. Thinking of this, Lao Wu gave himself a big check mark in his heart, "Tsk tsk... He is simply a genius."

····'.

"What's wrong, Lao Wu?" Xie Fei's words brought Lao Wu back.

"I'm... I'm thinking..., Nine Links, yes... Nine Links."

Xie Fei and Xiaoya looked at each other. They were very puzzled by Lao Wu's current reaction. They were so mad that they let the donkey kick them.

"What should I do if I can't find the exit?" Xiaoya asked. She thought she could escape, but was slapped back by a ruthless slap. It would be better not to give herself hope.

"I think we are not far from the exit." Xie Fei squatted on the ground and began to draw a circle. "Assuming that half of this passage is downhill and half is uphill, then we are here now." Xie Fei pointed towards the circle.

"That's two-thirds of the way downhill."

"How do you know where we are going downhill now?" Lao Wu asked

Xie Fei glanced at Old Wu

Old Wu was so frightened that he immediately retracted his head. "I...why do I feel like it's...uphill?" Old Wu muttered.

"The water flow will not deceive us. The water flows downwards. This channel seems smooth and smooth. With the naked eye, it is impossible to tell which end is higher and which is lower. But the direction of the water flow will not deceive us."

"Then why do you think we are standing on the lower ground?"

Xie Fei rolled his eyes at Old Wu again. In fact, his first impression was the same as that of Old Wu. He discovered the problem by accidentally discovering water etching marks on the stone wall. As he walked forward through the passage, no matter where it was,

The width, degree of corrosion, and height of the cave roof are all the same. Human eyes see all this and then transmit it to the brain through nerves. In other words, they have subjectively determined that the walls of the passage are smooth and the roof is flat. The brain believes this.

It is very difficult to change everything, but what we see is only part of the cave roof and not the whole. It may also be because the light is limited and it is difficult to shine on the cave roof. We cannot see the changes in the cave roof. When we arrive here

Sometimes I can only feel that the cave roof seems to have become shorter. This signal is transmitted to the brain, but the brain already has the same impression of the cave roof, so the conclusion is that the passage is uphill. People always think that what they can see with their eyes

It is always true, otherwise it is mainly caused by my own eyes not being able to see things continuously and comprehensively.

"Are you ready?" Xie Fei asked

"what to prepare?."

"Get ready to pee." Xie Fei laughed "Haha." He knew that if he just talked to Old Wu in theory, even if he couldn't understand it even if he talked about it for three days and three nights, it would be better to do something practical and let him die.
Chapter completed!