The off-road vehicle was parked in front of the large iron gate with a concrete wall.

It was two o'clock in the afternoon in winter, the sun was still warm, and the breeze blew, emitting a pungent smell from the courtyard walls.

The three of them got out of the car, and Zhao Dagang ran to the iron gate and looked into the courtyard through the crack in the door.

The courtyard was quiet, Zhao Dagang looked at it for a while, and beckoned to the two: "There seems to be no one inside." ”

There is a lock on the big black iron door, and Zhao Dagang is pulling it twice, very strong, "Lock the door, you can't get in, you only look outside, you can't see anything." ”

Zhao Dagang turned to the side of the cement wall, looked up at the wall more than two meters high, and sighed: "It's too high to climb over, it would be nice if there was a ladder." ”

As he was talking, he suddenly heard a "squeak".

Looking back, the iron door had been opened.

Running back to the big iron gate, Zhao Dagang found that Nan Zhiqiao was holding an open iron lock in his hand, and with a gentle push, the iron door was wide open.

Zhao Dagang asked in surprise: "You can unlock the lock without a key?!"

"Well, that's one of the skills of undercover investigators. ”

Nan Zhiqiao said lightly, but Zhao Dagang couldn't close his mouth in surprise, no one in the lockpicking company in the town had this technology.

The empty yard is covered with weeds, and in the middle is a circular cement pool.

The three of them walked into the courtyard, and Zhao Dagang excitedly wanted to run around the circular pool to see what was inside.

As soon as he stepped on the straw, he suddenly fell into the air, his body was crooked, and half of his leg fell into the ground.

Zhao Dagang fell, and one leg was still stuck in the ground, this sudden situation provoked Zhao Dagang to exclaim, "Ah...... Help!"

Nan Zhiqiao and Zhen Zhen stepped forward to help, grabbed Zhao Dagang's arm, and pulled him out.

I wore a lot of clothes in winter, but fortunately I didn't get hurt.

The three of them retreated to the corner, and Nan Zhiqiao carefully looked at the straw on the ground in the courtyard.

The straw may seem messy, but at intervals, there is a small circular pile of grass surrounded by random weeds.

Nan Zhiqiao instructed: "Everyone be careful, let's move the round grass pile away first, there is something underneath." ”

The three of them began to go from the iron gate to the courtyard, collecting straw one by one.

Sure enough, as Nan Zhiqiao expected, under the straw pile were round wellheads, with a diameter of about 30 centimeters, and they were bottomless.

After cleaning up the straw, I carefully counted it, and found that there were twenty-four wells in the yard, each of which was a round well with a diameter of more than 30 centimeters.

The trio walked around the small circular well and came around the central pool of the courtyard.

The diameter of the central pool is more than ten meters, and the height of the surrounding cement is more than one meter high.

Zhao Dagang covered his nose, "This is the smell, and it often wafts out from nearby factories." ”

Ye Zhenzhen also stared at the green liquid in the pool, and looked carefully, the liquid level gradually dropped, and many small holes were exposed under the big pool.

"Senior Nan, look at these small holes under the pool, they should lead to the round wells around them. ”

"Well, I guess it's that they first pour the waste liquid into this big pool, and the waste liquid flows through the holes reserved under the pool into these round wells around the yard, and the waste liquid is discharged into the ground. ”

Nan Zhiqiao and Ye Zhenzhen were talking about the flow of waste liquid in the yard, and Zhao Dagang also interjected and asked, "Are these the deep wells you just mentioned, or the seepage pits and seepage wells?"

"It's seepage wells!" Nan Zhiqiao replied exactly, "These round wells are drilled with relatively primitive technology, and they do not meet the technical standards for deep well filling, if these wells are shallow, they will pollute the shallow groundwater, and if the wells are deeper, they will pollute the deep groundwater." ”

Seeing the situation in the yard, it can be regarded as finding the source of the mercury poisoning incident, and the next thing to do is to collect evidence as the basis for future disposal in accordance with the law.

Nan Zhiqiao took a camera from the off-road vehicle and took pictures and videos of the yard.

In addition to the things in the yard, it is necessary to find the factory that transports the waste liquid, and now there is nothing in the yard that can prove its ownership, and to get the evidence of the waste liquid transportation factory, you have to wait until the water tanker comes back in the evening, and when the time comes, follow the water tanker back to find the culprit.

Nan Zhiqiao and Zhen Zhen discussed the plan of action for the night: the two of them first hid in the dark, waited for the water tanker to come, and then sneaked under the water tanker, followed the water tanker back to the factory, and after collecting evidence in the factory, they sneaked out again, and everything was unaware.

This plan does not include Zhao Dagang, Nan Zhiqiao asked Zhao Dagang to go back, but Zhao Dagang was unwilling, "I won't go back, I will also follow to see which factory is doing the lack of morality." ”

Nan Zhiqiao persuaded: "The action at night will be dangerous, and you are not suitable to participate. ”

"If there is any danger, I can climb the car and the car, besides, I am quite familiar with the factory here, and if you can't find your way out, I can still help. ”

Nan Zhiqiao didn't speak, still disagreeing.

Zhao Dagang was determined to follow the two undercover investigators in front of him, "Besides, I sent you here, I walked so far, now let me go back alone, this is so far away from Nanwan Town, I will be in danger alone." ”

Ye Zhenzhen thought it was funny, this Zhao Dagang, in order to stay, find a reason to be insincere, he usually walks from the town to catch hares alone, and it is a big night, and he is not afraid of danger, not afraid of tired, now it is broad daylight, but he feels tired and afraid?

Ye Zhenzhen thought of a compromise solution, "Brother Zhao, why don't you help watch the off-road vehicle here, and wait for us to finish collecting evidence in the evening, and then come here to make peace with you." ”

Zhao Dagang looked at the beautiful woman in front of him, and then looked at the serious and cold man on the side, and finally nodded reluctantly in agreement, "Okay, I'm here to help you look at the car, but this off-road vehicle is too eye-catching, so you have to drive into the nearby woods and hide." ”

The trio reformulated their plan and first hid the buggy in the nearby woods and camouflaged it with branches and weeds.

After disposing of the off-road vehicle, the three of them restored the surface of the yard to its original state, re-covered the wellhead with straw piles, and found materials to seal the holes under the large pool to prevent the waste liquid transported at night, and then flow into the surrounding seepage wells.

The yard was tidied up, the big iron gate was closed, locked, and everything was as if no one had ever come.

The three of them returned to the woods around the yard and waited for the arrival of the water tanker, and to be on the safe side, Nan Zhiqiao and Ye Zhenzhen also changed into factory workers' work clothes.

——

On the night of early winter, the cold wind was biting, and the three of them hid in the forest and shivered from the cold.

Nan Zhiqiao stretched out his hand to hold Zhen Zhen in his arms, the two of them warmed each other, Zhao Dagang nestled a little far away, and half-buried himself between the dead leaves on the ground, both warm and hidden.

Unexpectedly, close to one o'clock in the morning, a water tanker truck swayed through the hillside woods.

"Senior Nan, the car is here. ”

Nan Zhiqiao let go of the hand holding Zhen Zhen's shoulder and made a silent gesture, and Zhao Dagang next to him also poked his head out of the dead leaves.

The water tanker stopped in front of the big iron gate, and the driver got out of the car, opened the lock with the key, and pushed open the iron door.