When Liu Gan and the team in the Galaxy returned to the main building to meet Zhang Shengli, Zhang Shengli reported good news to Liu Gan with surprise. He found a secret door leading to the underground in the stairwell on the first floor and the second floor.

There was originally a wooden cabinet there. After removing the wooden cabinet, the wooden floor behind could be uncovered as a whole. After the wooden floor was uncovered as a whole, a round alloy hatch appeared, which was locked. As long as the lock on the top was opened, you could go down from here to below.

There is no mark on this alloy hatch door from Sanyu Company, which is different from the one Liu Gan saw in the negative second floor warehouse of the Biochemical Intelligence Research Center Building before. It does not seem to be an electronic lock structure, but a door lock that can only be opened with a special key.

Zhao Meng walked up and became busy with his homemade lock unlocker, but after a few minutes, he retreated out in a dirt.

"This is a mechanical door lock device that I have never seen before. It should require a specific key to open. With my skills, I will definitely not be able to handle it." Zhao Meng reported to Liu Gan awkwardly. The door lock could not be opened. He knew just by trying it that the door lock that could be opened only takes time, and if it cannot be opened, it would be useless to spend more time, so it would be impossible to open it.

"I really can't open it? Don't try it more?" Liu Gan's expression was a little unwilling.

"If it can't be opened, I'll know it after a try." Zhao Meng answered Liu Gan. Bai Du Yixia Hey, Yan, brother, watch the chapter without pop-ups for free

Seeing that Zhao Meng could not open the lock, Liu Gan began to try to open the lock violently, but after being busy for a long time, Liu Gan also gave up.

The ground is a reinforced concrete structure. Judging from the sounds coming from the knock, there should be a deep well below the circular cabin door. The surrounding area of ​​the deep well is likely to be made of reinforced concrete. There may even be a steel well bore in the deep well. Unless the designated key is used, there is no possibility of strong demolition.

So Liu Gan asked the three groups to take action again. This time, he was looking for the keys. He not only searched for all the building rooms, but also searched for every corpse. As long as it was something similar to a key, he would collect it and bring it back here.

"Why are we going so hard this midnight? This island is not safe. I think it would be better for us to leave this island and return to the yacht. We can also move food and other things to the yacht!" Zhou Mingliang couldn't help but speak.

"Yes! Something happened to Zhou Jingjing just now. Maybe who will be the next one. Maybe someone will be killed and then eaten. Why not have any accidents? Let's take a yacht to leave this island while there is no accident yet!" The others also echoed a few words.

"Master Liu listen to everyone's opinions." Zhou Mingliang saw that many people agreed with him, so he said to Liu Gan again.

"It's not your turn to make a decision here. If you don't want to follow my rules and stay in this team, next time you dock on the offshore island, I will give you a chance to leave alone." Liu Gan was a little upset that he couldn't open the door of the secret laboratory, and he couldn't help but get angry when Zhou Mingliang was so annoyed.

"I'm just talking about it, where is it my turn to make the decision? Master Liu doesn't have to be so angry." Zhou Mingliang replied to Liu Gan embarrassedly, and finally stopped talking.

All the team members were very tired, but under the urging of the leaders of each group, they had to take action. Although they didn't dare to say anything, they felt that Liu Gan was trying to find something. Why don't you let everyone rest for a night and search tomorrow?

Of course, Liu Gan had his reasons for doing this. He felt that the island was very strange, especially before the mutant zombie with hallucination ability was killed. He didn't want the team to stay on the island for too long, so he searched the secret laboratory and immediately left here and returned to the yacht, which was also for the safety of the team members.

The next search took about half an hour. Everyone searched at least a dozen keys from the room and on the bodies, but none of them could open the circular hatch. They showed it to Zhao Meng, and Zhao Meng also confirmed that these keys could not open the circular hatch.

"There are two levels of mechanical locks, and the key should also have two levels. The first level is about ten centimeters long, and after the second level is expanded, it should be about eighteen centimeters. The key may have five teeth, two of which are concealed, and there is also a mechanical trigger mechanism on it. Only when the key penetrates a certain depth in the keyhole will the mechanical trigger mechanism pop out. Unfold the second level key teeth and enter the deeper keyhole to open the hatch door." After studying the hatch door lock again, Zhao Meng told Liu Gan about his speculation.

"Can you make a tool like this to pry open the door lock?" Liu Gan asked Zhao Meng.

"If it were at my house, with electronic lathes and all kinds of tools, I would have spent more than ten days to make such a lock-opening tool, but this condition is not met here." Zhao Meng shook his head at Liu Gan.

"The team members are all very tired. Master Liu, what are we going to do next? Go back to the yacht, or take a rest on the spot?" Zhang Shengli pulled Liu Gan aside and asked him tactfully. When he was leading the team just now, the team complained, and it was indeed a bit unpleasant to continue to do this.

"It's midnight, the yacht is not very safe in the water. Xiao He and I have just confirmed that the thing came out of the water, with hallucination ability, and it is likely to have followed us. If we stayed on the yacht, who knows when it would come out of the water to attack us? Its hallucination attack was launched remotely, and everyone stayed on the yacht had no power to resist. It would be difficult for something to disperse." Liu Gan shook his head. He would definitely not leave the island before exploring the laboratory.

"What you mean is that everyone will continue to stay on this island and will not go anywhere?" Zhang Shengli confirmed to Liu Gan.

"Yes." Liu Gan nodded.

"I heard you just said that the thing launched a hallucination attack on Zhou Jingjing when he entered the women's bathroom, which shows that its long-range attack ability is very limited, and may be only a few meters away. It is better for us to enter the first floor hall, play the floor in the center of the hall to rest, and then leave people on duty, looking at four directions. As long as we find it coming in, we will immediately issue an alarm. It seems that it will not be possible to hallucinate all of us at once. As long as I, Mr. Liu and Xiao He have no hallucination, we can launch a counterattack on it." Zhang Shengli thought of an idea. (To be continued.)

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