Seeing that Sedum was willing to go underground with him, Su Wuxian was excited again, so that he still had a chance to get the medicine.

Su Wuxian directly lifted the wooden board under his feet, revealing a hole that only allowed one person to pass through.

"Such an obvious hole, isn't it afraid that people in the greenhouse area will find it?" Sedum asked curiously.

"It's nothing to find out. They all know that people in the dungeon often go out." Su Wuxian said.

"I see."

Originally thought that Su Wuwu's mysterious appearance meant that they were restricted from going out because they lived underground, but now it seems that this is not the case.

"Although I don't care about it, the places near the greenhouse area are not allowed to approach casually, for fear that we will destroy the greenhouse." Su Wuxian said again.

"How do you live underground?" Sedum asked, changing the subject.

"There are food reserves, you can get some every day, and you will go out to collect supplies. Sometimes the people in the greenhouse will come to trade, exchange some food with us, and we will also exchange things for some electricity and other things." Su Wuwu Said.

After hearing this, Jing Tian didn't understand very clearly, but she also understood that there is still a trade between the underground and the people in the greenhouse, which can guarantee the basic survival of the underground personnel.

It is rumored that the living conditions in the south are much better than those in the north. It seems that they are targeted, and the underground people will definitely not reach a good level.

At least the northerners don't have to worry about freezing to death outside.

Of course there is still a problem.

"Are there no zombies here?" Sedum asked.

"Of course, they often appear at night to attack the greenhouse, but every time they can be repelled by the greenhouse experts, harvesting a large number of crystal nuclei."

Su Wuxian answered Sedum's question while going down from the cave entrance.

Sedum also followed down.

About two meters down, Sedum smelled a not-so-fresh smell.

This is the original urban drainage pipe, but it was obviously re-excavated and widened later, allowing people to walk normally in it.

After a few steps, there was no light at all.

"Uncle, if you can't see clearly, hold my hand, and it will become more comfortable after walking for a while." Su Wuxian said to Sedum.

"No, I can see it." Sedum smiled lightly.

And Su Wuxian was not surprised by this, he knew very well that this uncle should be a person with abilities, and those persons with abilities are not afraid of the dark.

After walking a short distance and turning a corner, Sedum found the light.

Not lights or fire, but light from above.

When I walked in and looked up, I found that a manhole cover above had been replaced with transparent glass.

That's not bad.

After less than a few tens of meters forward again, Sedum understood what was going on when the Suwu line said it was spacious.

It turned out that they entered the subway!

It is indeed a lot more spacious here, and the smell is light.

At this time, 'rooms' began to appear on the walls on both sides of the railroad tracks.

They are all holes dug out of the wall.

In the cave, you can see some items on the ground, which should be the beds of the people.

Such 'rooms', the more they move forward, the denser they become.

As for the temperature underground, it is much stronger than above. It should be a few degrees above zero, so that people in thin clothes will not freeze to death.

Occasionally saw people, but did not respond to the appearance of Sedum and Su Wuxian. These people were all sitting at the door of their respective 'rooms', looking bored.

"Are outsiders here casually coming in?" Sedum asked Su Wuxian in a low voice.

"Yeah, there's nothing here anyway, anyone who wants to come can come, maybe they can bring us something useful."

Su Wuxian thought of something here, and said in a low voice; "There is also a place where you can't go casually, that is, the underground material warehouse. Master Zhou is very strict, and anyone who dares to move his mind will be beaten to death."

"Who is Lord Zhou? A bully?" Sedum asked.

"No, Lord Zhou is considered a good person. Without him, we would be bullied even more. He brought a group of capable people to protect everyone." Su Wuxian said hastily.

"A person with abilities?" Sedum frowned.

Hearing that in such an environment, there is still a capable person who is willing to protect everyone, Jing Tian really feels that the other party is a good person, and there are really not many such people now.

Of course, Su Wuxian is still young, some things can only be seen on the surface, and he may not have a thorough understanding of the actual situation, so Sedum will not comment too much.

As the two walked along the subway line, they came to a subway station after a while, which was obviously more spacious.

But the spaciousness here is also completely occupied by people.

Rows of small shacks made of planks or boards are fully occupied here.

Rows of shacks are connected together, leaving only a narrow passage in the middle.

There are so many noisy people, I don't know what they are talking about.

And above here, there are actually a few lights on, barely illuminating this place.

The only constant is that the smell here is getting stronger and stronger.

Su Wuwu told Jing Tian that they would open the air exchange door once every two days in the dungeon, and only ten minutes at a time to circulate the air.

Otherwise, over time, the temperature accumulated in the dungeon will be completely exhausted.

Even so, without taking a breath, some people with poor physiques would freeze to death.

Frozen to death on the one hand, and foul-smelling air on the other, they obviously chose the latter.

"How many people live in this underground?"

Sedum originally felt that there would be many people in this underground city, but now he felt that he might have underestimated the number of people in this underground city.

Just any subway station is like this, and the rest of the subway stations are obviously impossible to be vacant.

"I can't count. I only know that there are people in more than one hundred subway stations, and there are people everywhere on the line." Su Wuxian said.

Jingtian was slightly shocked. According to what Su Wuxian said, roughly calculated, there will definitely be no less than 200,000 people in this dungeon.

"Where do you live?"

Seeing that Su Wuxian took him away from the subway station and wanted to move forward, Jing Tian couldn't help asking.

"It's almost there. Because of Uncle Jiang, our group lives in a relatively good place." Su Wuxian said about his residence, and he was a little proud.

Sedum didn't ask any more questions, just followed suit.

It was indeed not too far, Su Wuxian stopped in front of the iron gate of an emergency escape route.

This kind of emergency passage is to prevent accidents in the middle of the subway and is set in the central location.

In Sedum's impression, the escape route should be just a corridor.

The iron door at the entrance of this passage is unusually thick.

It was supposed to be an eye-catching color, but it was painted black at this time, blending in with the surroundings, and it would be impossible to notice if you didn't pay attention.

Su Wuxian knocked on the door and shouted to the inside; "Su Wuxian."

A few seconds later, there was a creaking sound, and the iron door was slowly half opened.

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