This sound is very solid when you hear it.

Immediately, Li Yu said to Ding Jiu: "Can we continue the construction on rainy days?"

Ding Jiu stretched out his hand, felt the amount of rain, and pondered for a while before saying, "I still don't recommend it. It's a rainy day. If you build a wall on a rainy day, it must be well sealed.

But now that there are zombies outside, if we want to seal it well, we have to work outside the wall. This is too risky.

In short, everything is to let the wall dry as soon as possible.

Fortunately, the temperature was relatively high yesterday, otherwise the parts constructed yesterday would have been affected by the rainy weather, causing the hardness of the wall to decline."

After hearing this conclusion, Li Yu was silent for a moment.

So he said: "What if we don't build on a large area? We don't build any more, we just build some guardrails on the edges and make them waterproof. Is that okay?"

Ding Jiu said: "You can try it. There is not much rain now, but with the current weather, it may take three or four days to dry. In addition, the built guardrail cannot get wet anymore."

Li Yu nodded and said: "Let's do this for now. Don't build higher for now. Let's finish the fence today."

Ding Jiu nodded and said yes.

Just as Li Yu was about to leave, he thought there were many zombies outside, so he said: "Your construction workers, each of you should tie a rope around your waist to make sure you don't accidentally fall during construction."

Ding Jiu said: "Okay, I will ask everyone to be careful."

Li Yu felt relieved now.

Seeing He Chao, he also said: "Let the brothers who are on duty outside come back quickly, while the rain is not heavy yet, there are not so many zombies outside.

When it rains heavily, they won't be able to come back even if they want to.

In addition, you must also do a good job in protection. The protection of the second outer city here will be left to you."

He Chao nodded quickly and said he would get everything done.

After explaining all this, Li Yu returned to the duty room at the main entrance from the Second Outer City.

Now that the wall is connected to the city, wherever they want to go, they can just walk through the wall.

The duty room at the main entrance is the largest, with a space of dozens of square meters.

It was filled with guns, ammunition, and light machine guns.

Li Yu sat in the duty room for a while, looking at the pictures on the screen, which were all camera pictures near the wall and outside the base.

In the picture, the drizzle is blurry, and some zombies are wandering in the rain.

Some zombies raised their heads and swallowed the rainwater, while others walked numbly.

But in this rain, all the hidden zombies came out.

It seems that in the rain, they are the masters of this planet.

In the base, the crops that were just planted also swallowed up precious rainwater and grew vigorously.

Li Yu sat in the duty room for a while and then came to the cell where the gentle man Madi was imprisoned.

Outside the cell, Li Haoran was watching the rain falling from the sky in boredom.

Seeing Li Yu coming, Li Haoran quickly stood up from his stool and said to Li Yu: "Brother."

Li Yu nodded, looked at Li Haoran and said, "How is that person inside now?"

Li Haoran said: "I didn't speak the whole time. If I gave him food, he would eat it. If I didn't give it to him, I wouldn't make a fuss. I just kept silent. I asked him questions and didn't answer anything."

Li Yu thought for a while, opened the cell door and walked in.

The room was a little dark.

Bah!

Li Yu turned on a white woven lamp.

That Madi was sitting on a stool, his feet were cuffed with iron chains, and his hands were tied with silver handcuffs.

At this time, as Li Yu turned on the white woven lamp, Ma Di stretched out his hands to cover the light in front of his eyes.

Li Yu pulled a stool and sat in front of this man.

The backrest of the stool is in front. Li Yu puts his hands on the backrest and sits on the stool backwards.

Look at this man quietly.

The man also heard the sound of someone coming in, but he did not rush to open his eyes to see who was coming. Instead, he slowly waited for his eyeballs to adapt to the light, and then slowly took his hand off.

When Ma Di saw it was Li Yu, his eyes narrowed slightly, and the fear in his eyes disappeared in a flash.

Li Yu just sat in front of him, saying nothing, just looking at him.

"Do you know that there is a correlation between rain and zombies getting stronger?" Li Yu suddenly asked.

"Is it raining?" Madi said.

Then prick up your ears and listen carefully to the sound.

crackling

Raindrops dripped on the eaves, and water on the eaves outside the room splashed on the steps.

"It's over." Li Yu also said to him patiently.

"The formation of zombies comes from meteorites from the sky, and the rain falling from the sky. There must be some elements that we have not studied, which cause these zombies to change."

"Elements that have not been studied?" Li Yu asked.

"Yes, I actually studied the difference between rainwater and groundwater at the chemical plant before. Except for some explicit elements and some normal trace mineral elements in the ground, I didn't find any difference at all."

Li Yu asked again: "Then why did the green zombies appear? What did you do?"

Madi thought for a while, various thoughts flashed through his mind, and said: "The green zombies are because the pH value of the water is too high, which severely consumes carbon dioxide, and beneficial algae cannot reproduce.

But this is only the superficial reason for turning green. It is just a dominant feature and has no necessary connection with the zombie becoming stronger.

The experiment I did has nothing to do with this.

It's just that in the chemical plant, a piece of chemical waste was scrapped because it had been in disrepair for too long, and then flowed into the wastewater treatment tank.

Later, I studied the wastewater discharged from the chemical plant and compared the elements and microorganisms in rainwater. There was no pattern at all.

I have no clue at all. I have researched for a long time and can't find any correlation between them.

It’s totally meaningless and there’s no discovery. I’ve done many experiments and there’s no pattern at all.”

Li Yu listened carefully and said, "So, when we saw you, you collapsed?"
Chapter completed!