There really was a blank space behind the bookshelf. It wasn't some huge secret space, but rather a button.

Holy crap! Is this some kind of trap within a trap?

There's definitely something fishy about this house!

Mu Qingyu excitedly pressed the button, ready to run or jump out of the window if danger struck.

Nothing dangerous happened, but a hole slid out of the ground!

Mu Qingyu carefully entered and found herself at an elevator entrance. The elevator only had a down button. After Mu Qingyu pressed it, the elevator started and began to descend.

The presence of electricity here indicates the existence of large-scale power generation facilities!

As she went down the elevator, Mu Qingyu secretly calculated the height and realized that there really was a basement! However, she never expected that the entrance to the basement was on the fifth floor, not on the first floor.

This further suggests that there is a hidden secret here!

The elevator doors opened, and Mu Qingyu stepped out. The moment the elevator doors opened, the entire space below lit up.

Sure enough, there are power generation and sensing equipment!

Looking around, Mu Qingyu was slightly shocked!

The entire basement was actually a huge laboratory!

In the center of the basement, there were two rows of neat tables, on which were placed various laboratory instruments, such as measuring cups, beakers, and distillation tubes.

There were also some scales and glass bottles containing powder and crystals.

At the other end of the basement, some distance from the table, were four cubicles partitioned off by thick walls, but without doors. Each cubicle was piled with a lot of things.

Mu Qingyu observed her surroundings as she slowly walked over.

The first compartment contained many large white plastic barrels filled with powder, with labels on the barrels clearly stating "potassium nitrate".

The second compartment contained stacked special woven bags, about ten layers high, labeled "sulfur".

The third compartment also contained black powder in white plastic buckets. This time, the plastic buckets had no labels, but Mu Qingyu knew that it was carbon powder.

Two words immediately popped into Mu Qingyu's mind—gunpowder!

Damn it! Gunpowder!

She had initially thought this might be a drug lord's hideout, a lab that produced heroin, but it turned out to be an arms lab!

They make explosives!

The fourth compartment contained ready-made explosives. They were the very simple, homemade kind, in cylindrical tubes, several bundled together, the kind that explodes when the fuse is lit!

It doesn't require highly advanced technology to make.

Even Mu Qingyu can recite the formula for this stuff, but making explosives requires knowing the proportions, which she doesn't know.

Previously, in her spare time, she had discussed with Mu Qingrong how to obtain gunpowder to manufacture bullets.

Mu Qingrong said that fertilizers contain potassium nitrate and sulfur. If he could find fertilizers and be given a set of laboratory tools, he would be able to extract them himself.

Carbon powder is relatively easy to obtain; if all else fails, you can make your own.

Mu Qingyu originally came to destroy the drug lord's hideout, but unexpectedly, she discovered a gunpowder depot!

Not only do they provide raw materials, but they also offer finished products and even laboratory tools.

After going around again, they found protective suits and gloves.

Now, all of these things belong to her!

Mu Qingyu was especially happy.

However, these things were quite dangerous, so Mu Qingyu carefully found several open spaces in the space away from other supplies to store them separately.

Fortunately, the space had been upgraded twice and expanded considerably; otherwise, Mu Qingyu really wouldn't have dared to store these things together with her own supplies.

After taking everything from the basement, Mu Qingyu set her sights on the power generation equipment.

The power generation equipment was also hidden in the basement, in a special compartment that housed a huge generator.

Mu Qingyu cut off all power, first stopping the generator, then turning on the emergency lights, disconnecting the generator's wiring, and finally putting the huge generator into the space.

Without power, the elevator naturally cannot start.

But this was no problem for Mu Qingyu. She simply opened the top door of the elevator and climbed back to the fifth floor from the basement.

There are usually ladders on the walls of elevator shafts for use when maintaining elevators.

Climbing to the fifth floor was effortless for Mu Qingyu.

Mu Qingyu also found out why Mo Huaiyu couldn't detect the presence of those three people.

To prevent accidental explosions, the basement walls and ceiling were coated with special paint and metal.

It was probably these special metals and coatings that prevented Mo Huaiyu from detecting them.

Then, just as the three people came up from the basement after their reconnaissance and were about to leave, they discovered that the village had been invaded by outsiders.

So when the door was pried open, those people didn't hesitate to throw out the explosives...

As for what happened to this village before the apocalypse, and why the underground laboratory remained intact, Mu Qingyu had no way of knowing.

Back upstairs, Mu Qingyu was extremely satisfied with her gains this time.

But with more things, the space started to feel small.

I made a special trip into the space to look at the numbers on the little wooden house.

She killed quite a few more zombies along the way, and the number on the cabin became "501".

The number exceeded 500, but the space didn't upgrade. Mu Qingyu was slightly disappointed, but at the same time, it ignited her fighting spirit—kill zombies and upgrade the space!

Right in front of her desk on the fifth floor, Mu Qingyu ate a sumptuous dinner.

A few days ago, Xiao Ai made a lot of cooked food, which is now stored in her online space. Now when she's out and about, she doesn't need to cook or eat dry food anymore.

My dear reader, there's more to this chapter! Please click the next page to continue reading—even more exciting content awaits!