This is a cave.

Karst cave refers to the cave formed by the dissolution and erosion of limestone layer by rainwater or groundwater, also known as Zhongru cave and limestone cave.

The place with the most karst caves in China is in the southwest border area, which is known as the one with the best landscape in the world.

The cave was formed about 100000 years ago. The deepest known cave is Wujia cave in Shuicheng, Guizhou, with a depth of 430 meters.

Because of the zigzag slide down the road, Gao Fei and others had no idea how deep the cave was, but according to the temperature estimation below, it would have to be at least one or two hundred meters below.

The area of this cave is not very large. It looks like more than 1000 square meters at most (you must know that the largest cave area is hundreds of thousands of square meters), but it is also full of strange rocks, with all kinds of stalactites drooping. Under the light of those luminous stones, it emits all kinds of light colors.

This pool is right in the middle of the cave. There are many black stones beside the pool. It looks very smooth without edges and corners.

However, Gao Fei and others did not pay attention to these stones. They carried a backpack on their back, held the 05 type muffle submachine gun tightly in their hands, and walked slowly to the top of the cave in a back-to-back triangular formation: a very flat black stone, rectangular, which was artificially chiseled.

When they jumped down from the black hole, they all found the iron plate with yellow sand at the mouth of the hole.

From the iron plate, it is not difficult to guess that it was installed on it by human beings - no matter how magical nature is, it is impossible to forge an iron plate to seal the hole.

And most importantly, this black hole is what Tietu called the navel of the dragon vein and the vent of the underground ancient city.

But what puzzled the three people was, since this is the navel of the dragon vein, why is it not an ancient city, or an ancient tomb, but a cave?

Just when Gao Fei thought of this problem, he heard Tietu say in a deep voice: "there must be a cave that can lead to the ancient city. Let's look carefully..."

Before Tietu's voice fell, he was responsible for searching for ye Xinshang in the southeast direction. Suddenly, he cried out: "is it Mr. Qin?"

Gao Fei and tie Tu quickly turned to look in that direction and saw a dark shadow in the southeast corner.

The shadow seems to be standing against the wall, but silent.

"Chengcheng, is that you?"

Because they were worried that the flashlight would stab the eyes of Qincheng City, they did not dare to turn on the flashlight, so Gao Fei quickly turned on the flashlight on the barrel (the torch installed on the barrel has a very domineering name, wolf eye) and shone there.

But then he found that the shadow was not Qincheng: the shadow had blue eyes!

"Spirit lizard!"

Tietu roared and pulled the trigger!

With the pleasant "dada" sound of the micro sound submachine gun, the bullet swayed out of the dark blue trajectory under the fluorescence, whistling away.

"Cluck!"

After a sad laugh, Tietu's bullets hit the wall of the cave, splashing a trail of dark red sparks and black debris, but the shadow suddenly disappeared.

Gao Fei, the three of them are all brave masters who have gone through life and death. Of course, they will not be frightened by the shadow's smile and its sudden disappearance. Almost at the same time, they have jumped off the stone and rushed to the place where the shadow just stood.

The place where shadow stood just now was a hole.

The cave is irregular, about one and a half meters wide and more than two meters high. The cave is dark and deep.

It seems that before Tietu shot, the shadow was ready to escape and hid in the cave.

Tietu was about to rush into the cave, but Gao Fei held him: "don't be impulsive. Let's check first. Is there any other cave?"

If all three of them rush into the cave to kill the shadow, what if something else comes out from the other cave and takes away the equipment they put under the stone?

What's more, they still don't know the situation in the cave. If they rush in and get lost, it's not good.

Tietudang stopped, formed a triangle defense formation with Gaofei again, and slowly retreated to Dashi with high vigilance.

When they came to Dashitou, they didn't worry about anything. They all took out a flashlight and began to search the cave carefully to see if there were any other caves.

After a careful search, Gao Fei determined that in the cave, there was only one hole leading to the depth, and then the Dragon navel more than ten meters above the head.

From that crooked navel, it's very good. It's like sitting on a slide. There's no stagnant one in the middle, so you come to the cave.

But it's pretty hard to get out of here.

Of course, since Gao Fei and others have come in, they don't plan to go out. After all, they are looking for it, and they haven't heard from Qincheng until now.

In addition to this pool, it's this cave. Gaofei is just behind Qincheng city. She can't have time to enter the cave, let alone fall into the pool. So where did she go?

Looking up at the height, when Gao Fei was about to go to the entrance of the cave, he heard ye Xinshang say: "eh, there are words on it!"

Gao Fei turns around and sees ye Xinshang shining a flashlight on the big rectangular stone.

This is a black stone, like a small bed, which is full of crooked words.

The three of them looked at the words on the stone for a while. They were all staring at each other. They could recognize nothing but the simple words "one, heaven, and heaven.".

However, Gao Fei is familiar with these characters, because they are similar to those in his anguijing, which should be the most popular Xiaozhuan in the Qin and Han Dynasties.

Unfortunately, Qincheng City, the only one among the four who can recognize Xiaozhuan, disappeared mysteriously.

After discovering that the big stones were engraved with small seal characters (ancient seal characters), the three Gao Fei discovered that the broken stones on the ground in the cave were all engraved with the same characters, but they were incomplete.

Some black stones are also painted with simple symbols such as people and animals. It seems that they are oracle bone inscriptions.

As for the top of the head of those stones that can shine, the three of them are naturally not in the mood to pay attention to, and look at the black hole again.

Staring at the entrance of the cave, Tietu said slowly: "the shadow just appeared, which should be the one that attracted us into the cave. If I guess correctly, there must be a mechanism installed in the passage where we slide down to "intercept" the teacher Qin who is about to slide out of the exit to a certain place. "

Goofy said coldly, "anyway, we have to go in and have a look."

With that, Gao Fei rushed to the entrance of the cave and got into it.

Ye Xinshang followed, after the iron slaughter.

Because of the limited resources, Gao Fei is the only one with a flashlight on, while tie Tu and his wife are armed with guns, ready to deal with unexpected accidents.

The tunnel of the cave is a little wider than the entrance, which can make two people turn around leisurely, and the foot is also very gentle, but the moisture is very big, wet, and occasionally you can hear the sound of water drops on the ground.

The three of them walked very slowly. He stuck to the wall on the right side, while the two of them stuck to the left side and half twisted their bodies to move forward horizontally.

Three people can feel that the road in the cave is gentle and winding, but there is no fork in the road, so people can go on like this.

The three men walked for about seven or eight minutes, and it was estimated that they had passed through the cave for hundreds of meters. The dark shadow with a pair of blue eyes never appeared.

It seems that what Tietu said is right. The purpose of his appearance is to attract three people into the cave.

At the same time, it also shows that the enemy deep in the cave is ready to take the bait.

It's just because they have been very smooth after entering the cave. On the contrary, the three of them feel a little bad and walk more slowly. At the same time, they also notice that some calligraphy and paintings seem to be carved on the wall of the cave.

The font is still oracle bone inscriptions or small seal characters that the three people don't know.

From this point of view, the cave was dug out in the oracle bone inscriptions era, and later generations carved small seal characters below in order to translate the oracle bone inscriptions on the cave wall.

But whether it was Xiaozhuan or oracle bone inscriptions, they didn't know each other, so they had to go to see the carvings.

The picture carved on the wall is very abstract and simple.

For example, a circle with several thick lines represents a person or an animal.

The picture is simple, but it is clear at a glance, which can make people guess almost at a glance.

Among these carvings, the most common one is a person who is obviously taller than others and wears a crown on his head. His chest can also be a little higher. It seems that this is a woman, or the queen.

The queen is leading her people to hunt down some black lines (wild animals) on all fours, holding things similar to long hair in her hands. It seems that she is hunting.

In addition to the Queen's hunting, there are also meetings, meals, rest, and even marching and fighting. It seems that their life is very colorful.

After several hundred meters, they saw a picture of the queen leading her people to worship.

The queen is not offering sacrifices to heaven or ancestors, but to a snake that seems to be coiled on high.

The snake, the snake god, the head, and two arms.

It seems that this should be a snake god, or the totem of the Queen's country.

Just like reading comic books, the carving plot on the cave wall gradually unfolds with the slow progress of the three people: when the queen worships the snake god, her soldiers escort several short men (some with chest bulging, some with a thick line, which seems to represent boys and girls) to the top of the mountain.

After escorting several boys and girls to the top of the mountain, the soldier put his spear on the ground and made a five body shape.

Then the snake god rolled up one of the boys and girls with his tail and opened his mouth

Seeing this, Gao Fei suddenly felt that his vision was a little blurred. He subconsciously raised his hand and wiped his eyes. When he continued to look, he found that the carving was more blurred, and his brain began to faint.

At this moment, Tietu suddenly whispered: "no, there is poisonous gas in the cave. These carvings are just to attract our attention. When we carefully ponder the meaning of the paintings, we are unconsciously poisoned!"

After being reminded by Tietu, Gaofei and his wife were frightened, and then raised their hands to cover their mouths and noses.

In their backpacks, they all carry the most advanced gas masks (gas masks are also one of the necessary tools for grave robbers, mainly for the gas and corpse gas in the tomb), but they forget this when they enter the cave.

Just as ye Xinshang was about to take out his gas mask, he heard a gloomy laughter coming from the depth of the hole in the distance: "cluck, cluck!"