Ye Lei stared at the map in his hand, carefully identifying the marked route. Before long, he arrived at his destination, the location of the air-raid shelter that had been marked.

Standing far away, Ye Lei carefully parked the SUV in a very secluded corner.

He knew very well that if he drove the car directly into the soldiers' line of sight, the consequences would be unimaginable.

If I were to be questioned by the other party, I'm afraid I wouldn't even be able to give a reasonable explanation.

Immediately afterwards, Ye Lei held Xiu Xiu's hand tightly, while Tang Xiaoting followed closely behind.

The three of them tiptoed slowly toward the path indicated on the map.

As he traveled, Ye Lei remained highly vigilant, frequently looking up at the sky to see if any drones were around.

After all, with the rapid development of technology, various advanced technologies are being applied to the military field.

Fortunately, so far they have not detected any trace of drones, and even the soldiers on patrol have disappeared without a trace.

This situation may be due to the unbearably hot weather, or it may be because this is an underground air-raid shelter, so there is no need to arrange personnel for patrols at all.

Following the route indicated on the map, Ye Lei finally found the path after many hardships.

The reason why it was so difficult to find its traces is that the place is extremely hidden, and the surrounding weeds are overgrown and disorderly, which makes the already hard-to-notice intersection even more tightly covered by layers of weeds.

However, perseverance paid off, and after persistent exploration, they finally found the entrance to the mysterious air-raid shelter.

The three of them carefully made their way down the narrow and steep stone steps, Ye Lei was worried that they might alert the military.

So he controlled the bloodthirsty bats and hid in a nearby high-rise building, waiting for an opportunity to strike; Tu Xingsun followed closely behind, after all, he might need to show his skills next.

It took them more than ten minutes to reach the bottom of this stone staircase, which was more than ten meters long. But unexpectedly, a sturdy wooden door stood in front of them, ruthlessly blocking their way.

Through the crack in the door, one could vaguely see that a thick, sturdy iron chain was tightly locked at the door handle from the inside.

Ye Lei pressed his ear against the iron gate and listened for a long time, but there was no sound. To be absolutely sure, he controlled Tu Xingsun to go inside first and told it to come out and tell them immediately if there were any people inside.

As a first-level corpse general, Tu Xingsun naturally understood his master's command. He burrowed into the cement ground and disappeared without a trace, restoring the cement ground to its original state.

Five minutes passed quietly. Tu Xingsun communicated with Ye Lei using his consciousness, saying, "We haven't detected any trace of anyone inside."

Upon hearing this, Ye Lei quickly took out his lightsaber, its blade gleaming with a ghostly blue light. He then placed it in the crack of the door, on the thick iron chain.

He gritted his teeth and exerted all his strength. With his strength attribute boosted by 530 points, the iron chain broke without a sound.

However, just as the iron chain was about to fall to the ground, Ye Lei had a bad feeling – you know, in such a closed environment, any slight sound will be amplified dozens of times or even more!

In the blink of an eye, Tu Xingsun scrambled across like lightning, catching the falling iron chain steadily without making a sound.

"Wow!" Ye Lei couldn't help but applaud Tu Xingsun's wit. After all, as a corpse general, his intelligence was indeed far superior to that of ordinary people.

When Ye Lei pushed open the door and stepped inside, he was surprised to find that it was a long and empty corridor.

He dared not delay for a moment, and quickly closed the door, cleverly disguising the broken chain back onto the doorknob to ensure that nothing went wrong.

"Brother Lei, what's the next step?"

Tang Xiaoting asked from behind.

"I don't know either. Let Tu Xingsun lead the way. If we're discovered, he can burrow underground!"

Ye Lei looked at the empty corridors on both sides and said.

"This method is good; it reduces the chances of being discovered!"

"This is the only way!"

Tu Xingsun cautiously led the way, and the three of them tiptoed and stealthily made their way deeper into the room.

Just then, a dilapidated, slightly ajar door came into view, with three faded characters faintly visible above it: "Changing Room".

Ye Lei had a sudden thought: this might be an excellent opportunity. If they could change into the white coats here, they could blend into the environment better and not attract too much attention.

So he stopped and gestured for the two people behind him to wait a moment. Then he tiptoed to the door and listened intently to what was happening inside.

After confirming that there was nothing unusual inside, Ye Lei made a decisive move, pushed open the door, grabbed Xiuxiu, and darted into the room.

Seeing this, Tang Xiaoting didn't dare to delay and followed her into the room, closing the door behind her.

Who are you?

A sudden voice startled them, and upon closer inspection, they saw a doctor wearing glasses.

"We...we came in to change clothes!"

Ye Lei hoped he could get through this.

"But I don't think I've ever seen you before. Which department are you from?"

The doctor in the white coat frowned, completely disbelieving what Ye Lei was saying.

"We...we're in the garbage disposal business!"

Ye Lei thought he looked like a doctor and said that such a department should not have any connection with him.

"Garbage collectors? No wonder I've never seen you before. Alright, hurry up and change your clothes, we're about to get to work!"

Holy crap! I actually got away with it, I'm so lucky!

"Okay, right away!"

After finishing his sentence, the man in the white coat opened the door and left.

Seeing this, Ye Lei quickly manipulated Tu Xingsun to follow closely behind. At the same time, the other two also quickly found three white coats to put on, straightened their backs, and followed the marks left by Tu Xingsun.

Before long, they arrived at a half-open door with the words "Laboratory" clearly marked on it.

Through the crack in the door, one could see a large crowd inside, but the slightly pungent smell of medicine wafting from the room was even more memorable.

Clearly, this was not Ye Lei's destination. So, he cautiously continued forward.

Next, they arrived at the next room and looked up to find the words "Injection Room" written on it. Could this mysterious place be the location of the experiment? Thinking this, Ye Lei's heart raced, but he also became more wary.