There are many caves in the valley, some of which have been developed for visitors to experience, while those that have not been developed have "no entry" seals.

Wu Shengnan stopped in front of a cave, and the white butterfly actually landed directly between her fingers, and everyone looked at each other.

"Do you want to go in?" Lin Fan looked at the red seal and asked with some hesitation.

Wu Shengnan nodded and said, "Go in!" ”

After speaking, the white butterfly seemed to understand Wu Shengnan's words, and flew straight in, and everyone followed.

It was very dark in the cave, there was no light, and after feeling a distance from the Fairy Valley, Zhang Tianyi turned on the miner's lamp with confidence. Wu Shengnan and Lin Fan also wore miner's lamps on their heads, and followed behind Bai Die with a small flashlight in their hands.

Zhang Tianyi looked up and observed the environment in the cave, this cave is very large, which can accommodate the three of them walking side by side, and the air inside is also very sufficient, so there is no need to worry about the lack of oxygen supply for the time being.

It's just that the further you go inside, the lower the temperature, and the air around you becomes humid, and before you can take a few steps, Zhang Tianyi's trouser legs were wet with the dew in the cave. Zhang Tianyi looked up and found that some stalactites appeared on the top of the mountain, and a lot of water droplets fell down the stalactites and smashed into his face.

Zhang Tianyi was busy observing the changes around him, but he didn't notice that the white butterfly stopped, and when he found out, he saw a three-way crossing in front of him.

"How is this going?" Lin Fan couldn't help asking, these three passages were exactly the same, and the specific direction could not be determined at all.

The white butterfly stayed in front of the passage for a while, and then flew around Wu Shengnan, Wu Shengnan looked at the white butterfly in mid-air and thought for a while and said, "Let's take the one on the right." ”

Zhang Tianyi felt that Wu Shengnan's judgment was a little hasty, and said, "Don't tell me that it told you that." ”

Zhang Tianyi was originally joking, but Wu Shengnan nodded seriously, and then walked in directly regardless of the dissuasion of the people behind him.

This passage is much smaller than the previous cave, and can only accommodate one person, and it has to walk with your head down.

Wu Shengnan stopped in front again and said, "There is no road ahead, but there is a cave in the ground." ”

"What kind of cave? How big is it? Zhang Tianyi asked in the back.

Wu Shengnan observed it and said, "It's oval, about eighty centimeters in diameter. ”

"Oval caves? Eighty centimeters? How do I feel where have I seen? Zhang Tianyi thought for a while and suddenly said, "Could it be a hole made by a white fox?!" ”

"That's right, it's exactly the same hole under that canyon last time!" Lin Fan said in the middle. The last time he was blinded by the fox, he fell into the white fox's den from the hole under the canyon, and Lin Fan can be said to remember it vividly.

"You fix the ropes, I'll go down and have a look!" Wu Shengnan said and threw the climbing rope to Zhang Tianyi.

"Wait a minute!" Zhang Tianyi stopped Wu Shengnan, then took out a burning stick from his backpack and said, "Let's take a look at the situation first." ”

Wu Shengnan said thank you when he took the burning stick, and then lit it and threw it down.

"How? What's next? Zhang Tianyi couldn't see it, so he could only let Wu Shengnan convey it.

"It's big down there, we're about twenty meters above the ground, and it doesn't look like it's dangerous." The incendiary rod illuminates the environment below, Wu Shengnan said after looking at it.

Zhang Tianyi fixed the climbing rope and said, "Then you be careful, if there is any problem, we will understand if you shake the rope." ”

Wu Shengnan threw the other end of the climbing rope down, and then slowly fell to the ground along the rope. When she reached the surface, she looked around, and it was larger than what she had just seen, and there was no concealment, and everything was in full view.

"No problem, come down." After Wu Shengnan finished speaking, he observed around.

Zhang Tianyi and Lin Fan landed one after another, and they walked over to find Wu Shengnan taking pictures of an animal's skeleton.

"What kind of animal is this?" Zhang Tianyi asked.

Lin Fan squatted down and looked at it and said, "It should be a cow, it has been dead for about many years, and some of the local bones have completely rotted." ”

"How do you think he died?" Zhang Tianyi asked casually.

Lin Fan took a photo nearby and said: "This should have been a riverbed before, you see that the stones on the ground have become very smooth because of the impact of the water for many years, I guess it accidentally fell down and drowned when drinking water." ”

"It's true that he drowned, but he didn't drown while drinking water." Wu Shengnan had already stopped filming and said: "There are no large wild animals on this mountain, so this cow can only be raised by the residents under the mountain, since it is raised by the residents, it is impossible to come here to drink water, calculate the location, we are now on the left side of the fairy lake, this cow should have been drowned outside and washed in by the water." ”

Zhang Tianyi couldn't help but praise in his heart, he didn't expect Wu Shengnan's observation to be so keen, even he observed for a while before discovering the problem.

"So there are other exits here?" Lin Fan raised his head and held a flashlight to survey around.

"Whether you have it or not, don't forget the purpose of our trip." Wu Shengnan reminded beside him.

"Come on, there's a hole here!" Zhang Tianyi beckoned the two of them over.

The hole is so narrow that you can only crawl forward. Zhang Tianyi took a flashlight and took a picture and found that it was very deep inside, but there was a wind blowing on the opposite side, which should be considered good news.

Zhang Tianyi was ready to explore the road first, and he asked Lin Fan and Wu Shengnan to wait here, and if there was no problem, they would follow.

The space inside the cave is very small, and there are raised stones inside, Zhang Tianyi was sore all over, and some of the stones were very sharp as if they had been cut, and a blood mark was scratched on his body if he was not careful.

Zhang Tianyi gasped and crawled forward, and pools of water slowly began to appear in the hole, and the further he went, the more water there became, until the last half of the hole was full of water, and Zhang Tianfang did not stop.

Zhang Tianyi blew a long whistle to tell them that they could come in, and then continued to crawl forward. Soon the space in front of him gradually widened, and he was slowly able to walk upright, but at this time, the water level had risen to Zhang Tianyi's chest.

Zhang Tianyi hesitated, if he continued to walk forward, he would have to swim over, he took two more steps and found that the direction began to slope again, and when the water level dropped, the road ahead became the small cave before.

This time he quickly climbed to the end, Zhang Tianyi came out of the cave and felt numb all over his body, and he moved his body to hear the movement of Lin Fan and Wu Shengnan behind him.

"What's wrong?" Zhang Tianyi shouted inside.

"He's stuck!" Wu Shengnan said inside.

"Don't be in a hurry, take it easy, and slowly adjust your body along the direction of the hole!" Zhang Tianyi told Lin Fan to be calm.

After a while, he still didn't see the shadows of the two of them, and Zhang Tianyi was just about to ask about the situation when he heard the rumbling sound of falling rocks inside!

"Not good!" Zhang Tianyi got into the hole again and crawled in the direction he was coming and going.

"Let's go!" Wu Shengnan saw Zhang Tianyi and asked him to go out quickly, and then shouted at Lin Fan behind him: "What kind of backpack do you care, it's too late to come back!" ”

The sound of falling rocks in her ears was getting closer and closer, Wu Shengnan's face gradually became clear, Zhang Tianyi took her hand outside, and pulled Lin Fan out after she came out.

As soon as Lin Fan's front foot came out, the cave on his back foot was sealed by a cracked rockfall, and if he was half a beat slower, he would probably be buried alive inside.

Lin Fan gasped for breath for the rest of his life after the catastrophe and asked, "What kind of place is this?" ”

Wu Shengnan got up in the four circles, surrounded by dust, and the light was especially obvious.

Zhang Tianyi frowned and observed the surrounding environment, this is another cave, but this cave is not half the size of the previous one, the water in the cave is almost ankle high, Zhang Tianyi kicked the water rattling, and as soon as he looked up, he saw that there seemed to be something above his head.

"What is this?" Zhang Tian raised his flashlight and shone it on the roof of the cave, which was densely covered with colorful graffiti.

"Mural." Wu Shengnan took a general look and said, "This should be left by the people who walked the dirt gate." ”

After getting the answer, Zhang Tianyi took a closer look, but he really couldn't see where this was like a painting, it was more abstract than Picasso's, but there was a painting that he was quite familiar with, and he could see that the painting was a sacrifice of walking through the earth gate.

"What does this painting mean?" Zhang Tian couldn't understand it at first glance, so he asked.

Wu Shengnan looked at it with relish, pointed to the first painting and said: "The order of the paintings is arranged in order, the first one talks about the origin of the Tumen, according to the description on the painting, the Tumen should have existed before the Xia Dynasty." ”

"Before the Xia Dynasty? Isn't that the period of the Second Emperor of Yan and Huang? Lin Fan said.

"That's right." Wu Shengnan continued: "The painting says that there was another tribe at that time in addition to the tribe of Emperor Yan and Huang and Chi You. ”

"That tribe refers to the Tumen?" Zhang Tianyi asked again.

Wu Shengnan nodded: "But at that time, it was very mysterious to go to the earth gate, and after the battle of the deer, the Yellow Emperor thought about conquering the earth gate, but ......"

"But it failed." Zhang Tianyi saw a man in animal skin in the second painting who was defeated and fled.

The next few paintings are all about the history of walking the earth gate, from ancient times to the present, there have been countless people looking for the footprints of the earth gate, but most of them have returned by feathers, but there are still some people who have found the earth gate by mistake, but they have never come out again.

"And what are these last ones about?" Zhang Tianyi asked.

Wu Shengnan looked at it for a while and said: "There seems to be a split within their tribe, at that time the spirit fox was already very weak, they were divided into two groups of people, one group of people was fed up with the loneliness in the mountains and wanted to become normal people, while the other group of people stuck in the deep mountains and wanted to give the spirit fox a life. ”

"And then? The people who remained in the mountains perished with the spirit fox? Zhang Tianyi found that the mural was gone here.

"Maybe." Wu Shengnan sighed meaningfully.