After a short rest, everyone packed up and hit the road.

Li Er opened the ghost cong again, Jiang Jinjiu invited him to come up, and there was still no new discovery.

Qin Xuan put on the Yushu bell ring, and used a flashlight to shine on the white tiger and walked in front to open the way. The constant whistling sound in the grass made Qin Xuan very uncomfortable, twisting his neck and shoulders from time to time.

Qin Zhaoyun stole fun in the back and said, "Sister, what are you afraid of, your pants and shoes are stuck together, and nothing can get in." ”

"Die!" Qin Xuan reprimanded: "I'm not in the mood to take care of you!" ”

There was a sound of eating laughter from behind Qin Xuan, which made her mood even more irritable, and she didn't go far and suddenly turned around and jumped to Qin Zhaoyun's side, took off the Yushu bell ring and stuffed it into his hand, and scolded, "You die before you die!" ”

Qin Zhaoyun smiled and walked to the front with the bracelet, and was just about to shine on the bracelet, Li Er suddenly said, "There is light over there!" ”

The others looked at the location pointed by Li Er, which was a cliff. There are scattered plants growing on it, but there is a raised part at the bottom of it, and many vines grow on top of it, hanging down to shade the raised part.

Gongsun Zhi and the brother and sister felt different at a glance, the gray rocks on the cliff were all in shape, and the lines were very neat and smooth. There is a 45-degree slope from the bottom of the mountain, and there is a platform five meters long and three meters wide, and on each side is a gray boulder shaped like the sole of a foot, which is two meters high. The stone surface is rough, but there is no moss.

From a distance, it looked like a gray giant was sitting there, and the raised part looked like a stool made of tree stumps.

When everyone came to the platform, Li Er said that the light source was on the top of the two boulders.

Qin Zhaoyun climbed the boulder and found that there was a pattern in the center of the top, like a simple line drawing a woman's long hair that was spread out. But if you don't have the intention to look at it, it can only be said that it is the natural texture of the stone.

He climbed up another boulder, with the same pattern on it, and found that the ankle was concave into a basin, with a deep hole in the center of the small bowl. He shouted at the entrance of the cave, and his voice was dull, indicating that the cave was deep.

Li Er couldn't find any other clues, and Qin Xuan and Gongsun Zhi climbed the boulder.

After observing for a long time, the three of them didn't want to be famous.

At this moment, Qin Xuan noticed the vines on the mountain wall, the shape was very similar to the lines on the pattern. I saw that many of the vines were dead, and the dead branches under them were piled up. And he saw a deep hole in the hollow, and he had a whim.

"Senior brother, do you think you want us to light a fire on this? With those withered vines. ”

Gongsun Zhi was stunned for a moment, and then said, "It's okay to try." ”

They threw the dead vines onto the boulders until they were piled up with dead vines one meter high in the recess. Qin Zhaoyun lit the fire, and the withered vines caught fire when they saw it, and soon a raging fire ignited.

A fragrance wafted around, Qin Xuan broke the dead vine and looked at it, and said, "I didn't expect there to be a lot of oil in it, no wonder the fire is so strong." ”

But after burning for more than a minute, nothing unusual was seen.

Seeing that the fire was getting smaller, Qin Zhaoyun did not give up and continued to add firewood to maintain the fire.

After about five minutes, Li Er found that a slightly convex part in the middle of the boulder's "toe" had changed color. Curious, I looked closer, and found a circle of oval-shaped gaps, very small, from which hot air continued to seep out.

Li Er touched the boulder elsewhere, there was no heat, only this oval stone face was hot. He took out a dagger and pryed the stone, and it was easy to dig out a three-inch-thick stone bar, but what he didn't expect was that the stone bar was connected to an iron chain!

Li Er hurriedly called Gongsun Zhi and the two brothers and sisters, who were obviously shocked.

Gongsun Zhi carefully observed this iron chain, it was purple in the black, the texture was hard, the percussion sound was thick and there was no noise, there was no rust on the surface, and it was actually made of stainless steel!

Li Er proposes to pull the chain, but Gongsun Zhi thinks that the other boulder should first check if it has the same mechanism.

Qin Zhaoyun really found the mechanism chain in the same position, which means that the two chains must be pulled at the same time.

Gongsun Zhi asked the brother and sister to burn the fire to the fullest, and when he and Li Er pulled the chain at the same time, there was a burst of swishing sound when the firecracker fuse was lit, and then there was a loud bang, comparable to the second kick, and hot steam was spewed out from the gap on the edge of the raised part!

But then, except for the constant heat and steam, faintly mixed with the sound of stones rubbing, there was no change.

Gongsun Zhi asked Li Er, "Did you find anything?" ”

Li Er shook his head, and Gongsun Zhi continued to think. While staring intently at the protruding part, I gradually felt that something strange, but I couldn't describe the feeling.

He called Qin Xuan to watch with him, and Qin Xuan felt the same way.

Jiang Jinjiu has been silently watching, probably because he didn't think too much, his mind was empty, and the angle of seeing things was simple, but he found something strange.

The bark-like mountain wall is equivalent to a three-dimensional dislocation map, that is, an object that is not originally on a plane, because of the overlapping lines, it looks like it is on a plane, becoming a complete picture. Only by standing at a certain angle can you see the real state of fragments.

When I got closer, I saw that the raised part was not the whole mountain rock, but the mountain rock of different sizes, scattered and separated, and there was a certain gap between the front and back.

Li Er found the passage in the back, and led the others around in the gap, winding up, gradually entering the mountain. After a while, a round hole appeared, and the person could crouch through it. The stone edge of the entrance to the cave is smooth and neat, with many fresh abrasion marks, which look like they have just appeared.

"It's amazing!" Gongsun Zhi exclaimed, "Covering the entrance with a blinding method, using heat to open the passage, psychedelic techniques, tricks, today is really amazing." ”

Qin Zhaoyun also exclaimed, "It's not an ordinary institution, I found that there are six mountain rocks that have just been split into two petals, and they all rush the weathered side to the outside. This one has no operating arm, and the other has no mechanism hub, and somehow it was pushed to its current position, and I can't guess how it was done if I wanted to break my head. ”

Qin Xuan flattened his mouth and said, "Don't be, it's not that good, my head is big." ”

Qin Zhaoyun said with a smile: "No, where is it worth a trip, don't complain about the girl." ”

As he spoke, he pushed Li Er to climb into the cave, and he followed. Qin Xuan shook his head, sighed, and followed.

They thought they would have to climb some distance, but they got up and walked about 15 meters, and after another 10 paces and turned a corner, they were already in the middle of the mountain.

Gongsun Zhixi said, "There must be a road on every mountain path, and we are almost there." ”

Despite the narrowness of the mountain, the crowd quickened their pace, and soon came to the end.

As soon as he came out, his eyes suddenly opened up.

When the moon was shining in the sky, they could clearly see more than a dozen houses behind the forest below the mountain!

Everyone looked at each other, guessing for a long time, but they didn't expect that there would be a crowd of people living in the cave Tianfu. However, no lights were found in any of the houses, and I don't know if anyone was there.

Qin Xuan asked, "Senior brother, are we in the wrong place?" ”

Gongsun Zhi didn't answer, silently took out the locator, and the screen showed that the signal was lost.

Suddenly, there was a slight tremor in the mountain, and they hurried close to the mountain wall. After a while, the tremors disappeared, and there was a sudden roar in the crack of the mountain, accompanied by a large puff of dust.

Everyone held their breath, and when the dust cleared, Qin Zhaoyun said, "I understand, the activation mechanism relies on heat, and the iron chain on the boulder is used to pull the bolt to let the hot gas enter the mountain, and push out the mountain rock to open the passage." When the fire is extinguished and the rocks return to their positions, the passage will be closed. ”

Qin Xuan looked incredulous, "With that bit of firepower, can it work?" ”

Gongsun Zhidao said, "I think there will be a gas compression device every other section, which can make the gas have enough force to push the mechanism, and the final wave of air gushing out is the best proof of this." ”

Qin Xuan shook his head and said, "For more than two thousand years, the gas is compressed...... The ancients were incredible. ”

Gongsun Zhi said, "This also shows that we didn't come to the wrong place, let's go down the mountain and go to the house first." ”

Their position was halfway up the mountain, at least twenty meters above the ground. There are no roads everywhere, and there are smooth rocks on both sides and below, so you can only go down the mountain with a rope.

Qin Zhaoyun tied the ropes very skillfully and went down the mountain one by one. They are very skilled, and they slip almost all the way. In five minutes, they reached the bottom of the mountain.

In front of him is a bamboo forest, the bamboo trees several feet high grow densely, and the compass is still in a state of failure, and the moon cannot be seen after entering the forest, so it is very difficult to pass through the bamboo forest.

They walked for more than an hour and found a hand-paved stone road.

It is a road made of different shapes of mountain rocks, and I don't know what is buried underneath, and there is not a single weed on the road.

They could not tell which side of the road led to the houses, so they could only choose the left-hand side by feeling.

Not long after walking, everyone heard the sound of water, and after a while they saw a river, about a foot wide. There is a covered bridge made of bamboo on the river, about five meters wide, everyone went on the bridge together without feeling the slightest shaking, and did not hear the sound of being squeezed by gravity, and the bridge was quite stable.

On the other side of the river is still a bamboo forest, into which a stone path runs through. They walked for five minutes, and the bamboo forest came to an end.

There was an open space in front of me, and there was a large bamboo shed not far to the left, under which more than a dozen rows of low tables were neatly placed.

On the right is a two-story bamboo house, and the staircase leading to the second floor is on the left side of the bamboo house. There are exposed balconies on both sides of the second floor, and each floor is about 120 square meters.

Everyone came to the bamboo shed first, only to find that the dozen or so rows of low tables were not modern styles, but ancient bookcases, and the height should be used for kneeling or sitting on the ground.

Far from the stone road, in the middle of the first row, there is a separate bookcase. There is a cloth screen at the back, on which there is a painting of the words "Qingqing Garden in the sunflower, morning dew waiting for the sun." Yangchun Budeze, all things are brilliant. Often afraid of the autumn festival, the yellow leaves of the yellow flower decline. Hundreds of rivers from the east to the sea, when to return to the west. The young man does not work hard, and the boss is sad. ”

The font is Lishu and is in traditional Chinese.

All this shows that the bamboo shed is an open-air classroom, with four bookcases in a row, a total of twelve rows, and the scale is not small.

But now it is covered with a layer of dust, the bamboo mats are gnawed by insects, and there are two obvious holes in the roof of the shed, indicating that the classroom has been abandoned for a long time.

Finding nothing of note, everyone came to the bamboo house.

The door is unlocked and opens as soon as it is pulled.

Forty-nine bookcases were neatly arranged in the room, and six bookshelves stood on the walls, but there were no books on the shelves.

The dust in the room is heavy, and it seems that it is also a place that has been abandoned for a long time.

There was no suspicion on the first floor, and everyone went up to the second floor.

There are two rooms on the second floor, one of which is locked. But when I looked through the doorway, there were bookshelves inside, and there were no books on them, but bundles of things wrapped in cloth.

The other room is a bedroom, which is supposed to be the residence of a teacher or a manager.

At this time, it was late at night, and everyone had no intention of exploring, so they decided to go to bed first and talk about it at dawn.

Several people summed it up, and Qin Xuan slept in the bedroom. The others went to the first floor to make a bed with a bookcase to sleep, and Li Er kept vigil.