Although the people above did not quite understand many things, they still did what Lin Song said. The local police also encountered a challenge this time. To be honest, they had never seen this mentioned before.

kind of demanding person.

Seeing that the police had cooperated to block the manhole covers in several nearby blocks, Qian Donglu couldn't help but ask Lin Song: "I don't understand. What's the use of pressing down the manhole covers now? Since the other party entered from the outside.

, then they must have an exit to get out?"

Lin Song took out a computer next to him and opened the underground pipe network diagram that Zhao Xuelin had found earlier: "Look here for yourselves. The manhole covers here are equipped with self-locking devices.

This self-locking device has an inspection mode, which means that it can be opened from one side just like a door from the outside, but once in, it cannot come out from the inside.

Some people think that this design will cause danger to workers working in the pipeline, so it can be said to be rare in China, but border cities are an exception.

After all, border cities are close to the border, and there are many smugglers. The eyes of drug traffickers are staring here. The underground pipeline network is also a point they focus on.

In order to plug this gap, a manhole cover with an internal self-locking device is used.

We now assume that we are the ones who stole the rough stones. When we enter the pipeline with the excavation equipment, of course we have to find a way to close the door of the manhole cover in order to hide it from others.

After they got it, they even didn't forget to refill a section of the hole below, which took time. I calculated that the time from when the original was stolen to now is just enough for them to refill the hole.

Duan Kongdong. In other words, they haven’t left yet!”

Hearing Lin Song say this, everyone finally understood Lin Song's intention. Zhao Dongfeng frowned: "Then will they leave directly from the underground, walk to other blocks and then come up?"

"Absolutely impossible." Lin Song said, "See for yourselves, this is the blocking filter of the underground manhole pipe network. In other words, in the underground sewage pipes, there will be a blocking point every certain distance.

The purpose of this blocking point is to block special-shaped waste to facilitate desilting by municipal departments to avoid causing pollution and blockage in the port.

But now, this blocking point has become a barrier for them, and it is not easy for them to pass this barrier. At least now, we still have a chance to find a way to intercept them."

Hearing Lin Song say this, these soldiers suddenly became excited: "Does that mean we still have a chance to recapture the original stone?"

Lin Song said directly: "Everyone, listen up, I will start to arrange combat missions now!"

This time, both Zhao Xuelin and Zhao Dongfeng stood upright, waiting for Lin Song to assign tasks.

"Zhao Dongfeng, lead your South China Tigers combat team and continue to stand firm. If the opponent is forced by us, they will most likely try to return the same way, and then take the opportunity to hijack Chen Tianhao to break out of the siege, so you just go ahead and

It's better to ambush here, set up a circle and wait for the opponent to come in and jump.

Xue Lin, you lead the action team, together with the Snow Wolf team, we are now divided into four tactical teams, going underground from the four corners around here and searching towards the central area." Lin Song said.

Zhao Xuelin and Zhao Dongfeng nodded one after another. At this time, Lin Song looked at Chen Tianhao and said, "Mr. Chen, please notify the local police and municipal departments, and ask them to seize the time to block the surrounding sewage pipes and prevent us as much as possible."

The search area is separated from other places.'

Chen Tianhao didn't quite understand why Lin Song did this, but he nodded firmly: "I understand."

Lin Song smiled calmly and said in a heavy voice: "This matter is very important. You all know that what is thrown away now is not a fake, but a genuine rough stone. You all know what is inside the rough stone.

We will be wearing chemical protective equipment and fighting each other below the ground for a while. It will inevitably cause damage. I don’t hope that the ancient virus in the rough stone will follow the sewage pipe network and harm the entire border city."

Hearing what Lin Song said, everyone suddenly understood. Chen Tianhao nodded resolutely: "I understand, don't worry, Team Leader Lin. I will definitely ask the police and municipal departments to seal off the surrounding area. We will never let the ancient germs in the original stone spread to the surrounding areas."

.”

Lin Song nodded: "Okay, everyone, let's go!"

Within ten minutes, all the teams were in place. Lin Song and Zhao Hu worked in pairs, responsible for searching from the northeast corner toward the center area.

Opening the manhole cover, everyone put on chemical protection equipment and entered the sewer one after another. Many people have criticized it before. Generally speaking, the diameter of the main sewage pipe in a city is often about a few meters. But in China, basically

They are all about one or two meters.

It is precisely because of complaints in this area that China's urban sewage system has undergone major changes in recent years. The current underground sewage pipe network extends in all directions and is almost comparable to an underground city.

The area where Chen Tianhao and the others live is a densely populated area, and the pipe network in this area is relatively complicated. Some places are spacious, and some are narrow. If there is a guide, there may not even be a pipe network map.

It is definitely not an exaggeration to rush in under the circumstances and get lost inside.

Lin Song and Zhao Hu followed the direction shown on the map and searched slowly forward. Not far away, Zhao Hu complained: "Boss, you said it would be great if the snow wolf was here now, its nose would be able to smell

Get out of the opponent's position."

Lin Song held the gun, searched forward with his eyes, and said without looking back: "Snow Wolf? Snow Wolf is not omnipotent. Snow Wolf also has its weaknesses. Among other things, it is the stench in the sewer. Snow Wolf

Just can't stand it.

The sense of smell is extremely sensitive, and sometimes it is one of Snow Wolf's weaknesses, that is, it is easy to be misled and confused by others. I have my reasons for letting Snow Wolf stay on the ground to assist Zhao Dongfeng."

As the two men talked, they searched forward. Not long after, they heard a burst of gunfire from the front. Lin Song hurriedly turned to the communicator: "Who shot! Who shot!"

"It's not us!" Qian Donglu said: "My team and Zhang Feiyu's team never fired."

"It's not us." Zhao Xuelin said: "My own combat team has not encountered any enemy situations."
Chapter completed!