The laboratory is carved out of the mountain, and the two heavy doors are like the insurance doors of the bank vault.

They were surrounded by guards with guns, and even though it was late at night, they still didn't let up.

The drainage ditch that the fat man said was located on the left side of the laboratory, hidden among the lush weeds, if the fat man hadn't clearly told Lin Su the exact location of the drainage ditch, I was afraid that it would not be easy to find it.

Leaving the scar Zhou to let the wind on it, Lin Su and the iron panda came to the water outlet with their waists.

Looking at the iron fence welded by thumb-thick steel bars, Iron Bear rolled up his sleeves and pulled hard, but he didn't pull it.

He frowned, as if he was a little unconvinced, and pressed his foot against the concrete wall next to him to exert his strength again.

Seeing that the iron bear blushed and failed to open the iron fence with all his strength, Lin Su on the side couldn't help but sigh and shook his head.

"The craftsman said that your brain is full of muscles, and he is really right."

Tie Xiong was already embarrassed, but when he heard Lin Su's words, he was even more annoyed, and said with a glare: "Standing and talking doesn't hurt your back, you can try?" ”

"Look!" Lin Su pursed his lips and pushed the iron bear away.

He didn't grab the top of the steel bar like an iron bear, but the bottom of the steel bar.

Seeing this, Tie Xiong sneered: "It's good to grasp the top, and you don't even know this?" If you can get rid of Lao Tzu, you can eat ......."

'Boom'

Without waiting for Tie Xiong to finish speaking, he heard a soft sound, and the steel bar was broken by Lin Su!

"What to eat?" Lin Su looked at Tie Xiong with a smile.

The corners of Iron Bear's mouth twitched, but he didn't speak.

But I was thinking, what the is this.

I can't even get it open myself, this kid can?

Could it be that he has more strength than himself?

But how is this possible!

"It's not enough to have strength, you have to be able to use your brain." Lin Su pointed to his head.

"Hmph, you're just lucky, this steel bar has been loosened by me." Iron Bear is strong.

Lin Su was speechless, grabbed another steel bar and pulled it hard, and then broke another one.

He looked at Tie Xiong with a smile and asked, "This one was also loosened by you?" ”

This time, Iron Bear was completely speechless.

He said, "How did you do that?" ”

Lin Su touched the bottom of the steel bar, and then put his hand in front of the iron bear.

"What is this?"

"Rust." Iron Bear Road.

"Do you know now?" Lin Su said with a smile.

Tie Xiong was stunned, then patted his head and suddenly realized: "Ma De, why didn't I think of this stubble." ”

Needless to say, the wastewater discharged from the laboratory must contain a lot of chemical elements.

The steel bar at the bottom has been washed by wastewater for a long time and has long been corroded, so it is naturally easier to break than the top.

"You can do the rest." Lin Su clapped his hands and said.

Iron Bear nodded, without saying a word, and soon broke off several steel bars.

On the other side of the steel fence is a drainage pipe, which allows a person to climb in and out.

Lin Su turned on the flashlight of his mobile phone and shone it inside, then turned off his mobile phone and climbed in first.

He and Scar Zhou are fine, but the burly Iron Bear has suffered an old sin.

"Mader, these bastards, they don't know how to get a thick drain."

"Don't talk nonsense, hurry up, we only have ten minutes, and in ten minutes the guards outside will patrol over, once we are blocked in here, there will be no way to live." Scar Zhou whispered.

Iron Bear muttered a few curses and stopped talking.

The three of them climbed forward for about a few dozen meters, and the pipe began to extend diagonally upwards.

The pipes were already narrow and laborious to climb, but now they have to climb upwards, which is naturally even more difficult.

Especially the Iron Bear, he could barely walk through the pipe, and his face turned green when he saw the pipe extending upwards.

"Can I go back?" Iron Bear asked depressedly.

"It's not much easier to quit upside down than it is for you to climb up." Scar thoughtful.

Not long after climbing up, Lin Su touched a plastic water pipe with the thickness of a bowl.

He felt his way down the water pipe, which was blocked by a metal lid through which the plastic pipe had passed.

Lin Su rubbed forward, put his ear on the metal cover and listened carefully, and saw that there was no movement outside, so he carefully poked the plastic water pipe out little by little.

When he had plugged all the pipes back, a hole the size of a bowl appeared.

"Holy! No way? Lao Tzu can't get into it even if he cuts it into pieces. "Iron Bear Road.

Lin Su didn't speak, he reached out of the hole and touched it, and soon he touched a handle.

He grabbed the handle and pulled it down, only to hear a soft 'click' and a crack on the side of the metal lid.

Lin Su took his hand back, and with a hard push, the metal lid was pushed open.

He poked his head out, looked around, and then came out.

It was an empty room, and in the center of the room stood a large machine.

Two plastic pipes extend from the machine, one leading to the drain pipe and the other to the next room.

Needless to say, Lin Su also knew that this should be a sewage treatment equipment.

Obviously, what this lab is doing is dangerous, and the wastewater produced has to be treated before it can be discharged.

"Don't look at it, pull me." Behind him came the voice of the Iron Bear.

Lin Su and Scar turned around, grabbed Iron Bear's shoulders and dragged him out with one hand.

At this moment, Lin Su suddenly heard a sound of footsteps.

He hurriedly closed the lid of the drain pipe, stuffed the plastic drain pipe into the hole in the lid, and hid it with Scar Zhou and Iron Bear on the side of the sewage treatment plant.

After a while, the three of them saw a guy wearing a white coverall-dust suit and a protective mask walk in.

The man came to the machine and operated it, only to hear a buzzing sound, and then the plastic pipe connected to the drainage pipe shook, and sewage flowed down the plastic pipe into the pipe.

The corners of Iron Bear's mouth twitched.

This Nima is really lucky.

If the three of them were any slower, they would have to be drowned.

Being submerged is nothing, the question is who knows if the water discharged here is poisonous?

The man turned on the sewage treatment plant and prepared to leave.

Lin Su glanced at Scar Zhou, who nodded, coughed twice and walked out.

The man heard movement behind him, paused, and turned around.

After seeing Scar Zhou, he was stunned at first, and then said in fluent English: "Damn Southeast Asian monkeys, you must wear dust suits and gas masks to enter the experimental area, do you want to die?" ”

Scar Zhou grinned at him, shrugged his shoulders and said, "I don't want to die, but you should." ”

The man was startled when he heard this, and was about to speak, when the iron bear, who had already detoured behind him, grabbed him by the neck and pinched him so hard that the unlucky guy fell to the ground before he could scream.