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"No matter what, since they have set up an underground laboratory, there must be some ulterior secret." Qiao Yu's eyes darkened, and the light in his eyes flickered.

"There are a lot of mental fluctuations in this underground research room, and it's very complicated." Jiang Zhan interjected at this time, "We can't rule out the possibility that this is the sample library."

Qiao Yu and Yu Qingchuan were stunned when they heard this.

"Set the sample library underground?" Yu Qingchuan frowned, his tone full of confusion, "What is the reason for this?"

"I'm not sure yet." Jiang Zhan continued, "It's just a possibility. We won't know the specific situation until we go to other places to check."

Qiao Yu pursed her lips and said, "Then let's go check out other places first."

Now their movements are restricted and it is inconvenient to go in and check directly.

We can only write down all the problematic locations first, and then investigate them one by one after confirming the location of the sample library.

So the three of them came out of the main building and went to another auxiliary building on the south side.

In addition to the dormitory building, the City A Research Institute has three buildings used for research work.

——The main building and two auxiliary buildings, one in the south and one in the north.

The annex building on the south side only had four floors. The three of them still went directly to the top floor and started looking from top to bottom.

However, I found nothing unusual until I found the first floor.

Not to mention the sample library, not even a room with signs of life was found.

"Isn't this building not used for experiments?" Yu Qingchuan asked doubtfully, "Why is there not a single living body?"

But it doesn't look like this building is being used.

Moreover, many rooms have experimental equipment, which means that this place was definitely used for experiments before.

"It may also be that the experimental subjects or research subjects were moved."

Qiao Yu also participated in some exchange meetings in his previous life. Many research institutes would hide unfinished research projects during the exchange meetings.

After all, although there will be friendly exchanges between the bases, there will still be a competitive relationship after all.

Jiang Zhan didn't speak at first, but after reaching the first floor, he took Qiao Yu and Yu Qingchuan directly to the door of a research room and gently raised his chin, "Although there are no living bodies on the surface of this building, underground, There is also a secret research room.”

Qiao Yu and Yu Qingchuan looked at the research room in front of them, and they were both silent for a while.

Why is there an underground laboratory?

Does the research institute in City A conduct research underground every day?

Don't you feel bored?

"Could it be that that building on the north side... also has an underground laboratory?" Yu Qingchuan asked softly.

"No." Jiang Zhan shook his head slightly, "There is no need to go to that building, there is no mental fluctuation there."

Hearing this, Qiao Yu tugged on Jiang Zhan's clothes and said, "A-Zhan, which one has more mental fluctuations here than in the main building?"

Jiang Zhan thought for two seconds, "There are a lot of mental fluctuations in these two laboratories. In terms of quantity, they are almost the same."

"And it's all mixed with plants and animals."

Hearing this, Qiao Yu pursed her lips slightly.

"Could it be that...these two places are sample libraries?" Yu Qingchuan frowned again, "Then don't we have to check both sides?"

Where did a small city like A come from so many manpower and material resources to collect so many samples?

If there wasn't something fishy about it, he wouldn't believe it even to death.

Qiao Yu remained silent, but what she was thinking was almost the same as Yu Qingchuan's.

Through today's investigation, Qiao Yu is almost certain that there must be Han Ming's work in City A.

And judging from the current situation, Han Ming's deployment in City A was much earlier than that in City G...

"Go back first." Qiao Yu whispered, "We can't get in now anyway. Let's discuss the sampling matter after we figure out how to figure out the situation in their control room."

"Ah."

Jiang Zhan and Yu Qingchuan naturally had no objections. They both nodded and followed Qiao Yu back to the dormitory building.

When the three of them went back, Cheng Sinian and Luo Zhenzhen had not returned yet.

But Jiang Zhan sensed the mental fluctuations of Xiang Heng and Baili Zhuo.

They were also arranged to live on the same floor as Qiao Yu and others.

Qiao Yu and Jiang Zhan sent Yu Qingchuan back to his room first, and then quickly returned to his room while there were no patrolling guards around.

Just as he walked in and sat down, he heard a knock on the door.

Qiao Yu immediately looked at Jiang Zhan with questioning eyes.

Jiang Zhan leaned into Qiao Yu's ear and whispered, "Xiang Heng."

Then he got up and went to the door to open it.

Xiang Heng was originally worried that Jiang Zhan and Qiao Yu hadn't come back yet and just wanted to try his luck. Unexpectedly, the door actually opened.

Behind the door was Jiang Zhan's expressionless face.

Xiang Heng always felt that he was a little frightened when facing Jiang Zhan.

He couldn't explain the specific reason.

Obviously Jiang Zhan usually doesn't like to talk and doesn't show much attention. He follows Qiao Yu like a shadow every day, never leaving Qiao Yu.

But he just felt that Jiang Zhan was very dangerous.

He originally thought he was thinking too much, but after discussing it with the team members, he found that everyone felt the same way.

Since then, Xiang Heng has been more wary of Jiang Zhan.

Although he believed that Qiao Yu and the others would not harm him, he still had to be measured.

After all, Jiang Zhan doesn't seem to be very considerate of people.

Jiang Zhan stepped aside to make way for Xiang Heng to come in.

Xiang Heng walked in and found Qiao Yu sitting on the sofa nearby, waiting for him.

"Captain Xiang, please sit down." Qiao Yu smiled at him, stretched out her hand and made a gesture of invitation, gesturing for him to sit down on a chair nearby.

Xiang Heng noticed with sharp eyes that the sofa Qiao Yu was sitting on was very new and the fabric was very clean. It didn't seem to be originally from this room.

But he didn't ask any more questions, and just sat down on the chair beside him calmly.

After Jiang Zhan saw him sitting down, he returned to Qiao Yu and sat down next to Qiao Yu.

"Did Captain Xiang come to see us for something?" Qiao Yu raised her eyebrows and asked softly.

Xiang Heng did not follow Qiao Yu in circles and went straight to the point: "Captain Qiao, I want to ask about Manman."

"And...about Chu Yi."

In fact, he had already figured out something about Chu Yi after he was separated from Qiao Yu and the others and on the way to the survivor base in City A, but he was not sure, so he needed to verify it.

Moreover, he really didn't understand why someone with Chu Yi's identity and status would betray Commander Xie and the base?

Everything a mortal does must have a purpose.

Then Chu Yi...

Xiang Heng pursed his lips, "Captain Qiao, is Chu Yi's target this time... Professor Kang and Professor Shen?"