The fence wall was made of wrist-thick sticks, which had rotted out of shape, and the fence wall was crawling with creepers and creeper-like vines, blocking almost the entire gap between the sticks in the fence wall.

Time!

This is a trace of time, and a trace of desolation!

The middle-aged officer walked to the fence wall, and without hesitation, he lifted it with one foot, and the fence wall was kicked out of a big hole, and I immediately saw the black hole behind the fence wall, about five or six square meters.

I know the entrance has arrived.

Everyone entered the black hole in the fence wall, I don't know if it was a psychological effect, I always felt that there was a cold air blowing up from the hole, blowing on me, and the cold hairs on the back of my neck immediately stood up.

"Director Qin, this is it!" After the middle-aged officer finished speaking towards Director Qin, he looked at us again, "Everyone, wait a minute, if you want to enter the mine, you have to prepare something." ”

After saying that, with a wave of his hand, several other criminal policemen ran to the middle-aged officer with large bags on their backs, and dragged out a long thing from it, like a ladder, but the wooden sticks on both sides were replaced by ropes with the thickness of the wrist.

When I saw this, the word "ladder" popped up in my head.

In ancient times, the ladder belonged to the war equipment, which was used to climb over the city wall and siege the city.

Ancient ladders, some types of wheels under them, can be pushed to drive, so also called "ladder car", equipped with shields, winch, grappling hooks and other equipment, some with pulley lifting equipment.

The inventor of the ladder is generally believed to be the Spring and Autumn Period of the Lu State skilled craftsman Gong Yi Pan (Lu Ban), when the King of Chu Hui in order to achieve the purpose of dominance, ordered the Gong Pan to make the first cloud ladder in history.

Modern refers to a kind of climbing and climbing tool, mainly used for fire fighting and rescue. The ladder belongs to a kind of stone arrangement in the garden building, that is, an outdoor staircase made of mountain stones.

Unexpectedly, the "special for travel friends" thing was put in great use in the hands of the criminal police at this time.

Several criminal policemen were very skillful, and they cooperated with each other very tacitly, first fixing one end of the ladder on the ground outside the hole, and in order to be firm, they also used a steel rod more than two meters long to pick it up, and threw the other end into the pit. Jin Yong Chinese

It is estimated that the ladder must be more than 100 meters long, and in less than ten minutes, the four ladders have been fixed.

"That's it!"

The middle-aged officer was the first to go down the hole, he was thin, but he looked very strong and flexible.

It seems that the middle-aged officer is very familiar with this place, the ladder happened to reach the platform below, after going down the hole, I noticed that there are obvious traces of artificiality, and there is a hole about five meters behind the platform, the middle-aged officer took an extraordinary flashlight and shone it in, and the light disappeared into the darkness in the cave.

it! Another long cave, this is a hole that is diagonally downward, similar to the cave entrance to the crevice under the Yellow River that I entered earlier.

"Guys, this is the real entrance to the mine......"

The middle-aged officer motioned for everyone to sit down and rest for a while, and then told a story about the experience of digging the mine - he was only eighteen or nineteen years old at the time, and he was the youngest soldier in charge of assisting in the exploration of the mine, and he was the only one who survived in the entire twenty-odd people.

He didn't know how the hole was discovered, but later he heard that it was accidentally discovered by the drilling team of the Shengli Oilfield during a field operation.

When he came here, there were already a lot of people gathered here—at least fifty or sixty!

Everyone was busy building ladders and preparing to go down the cave.

Their job is to take care of everyone's safety and take them safely into the depths of the cavern.

Of course, the ladder frame they built back then was more responsible than the ladder, in short, it was similar to the staircase of a wooden building!

The middle-aged officer recalled that when they first came here, they found traces of artificial polishing, but at that time no one realized that they were facing great danger when they went inside.

To be precise, no one was aware of the danger at first, but was dizzy by what followed.