It's warm in the tank, and very... cosy.

This was Chen Xian's first feeling.

The former can be explained by tactile somatosensory, but what about the latter?

Chen Xian couldn't understand why he would feel at ease when he fell into this water tank. Those weird black liquids were not good things, but he didn't feel any resistance when immersed in them. No desire to crawl out...

Soaked in this filthy tank, Chen Xian's concept of time became blurred, and he could not perceive the passage of time at all, as if his consciousness had become blurred.

After an unknown amount of time, Chen Xian gradually woke up, and opened his eyes with "enjoyment" on his face.

At this point, the black liquid in the water tank was nearly depleted, leaving only some viscous residues.

Chen Xian maintained a supine position lying at the bottom of the tank, while the girl squatted silently in the corner, looking at him with a very happy look.

"What about the black water?"

When Chen Xian asked this, he had already sat up, raised his hand and rubbed his shoulders a few times, feeling indescribably comfortable all over his body, as if all the tiredness and sleepiness had disappeared.

The kind of satisfaction and comfort that comes from the heart, it is difficult to describe in words.

If you want to use an analogy, it probably feels like someone who has been insomniac for a long time suddenly fell asleep and is still in deep sleep... The strange sense of satisfaction and comfort when waking up is similar to Chen Xian's feel similar.

After sobering up, Chen Xian seemed to hear that pleasant sound from his soul, as if every cell in his body was cheering.

This refreshing body feedback made him curious, what exactly are those black liquids?

At this moment, the girl let out a double cry, stretched out her hands and patted the rubber tubes on both sides.

From the previous observations, it seemed that the black liquid was flowing out of these rubber tubes, but at this time, the rubber tubes did not respond even if the girl patted them.

The girl looked back at Chen Xian in disappointment, and screamed, like a child who wanted to eat candy but couldn't, and seemed to cry at any time because of her grievance.

"Go out first."

After Chen Xian finished speaking, he got up and walked out of the water tank, and the girl jumped out hurriedly, following behind Chen Xian like a small tail.

Standing by the water tank, Chen Xian observed carefully for a while, and his doubts became stronger.

There are many strange things about this appliance, and it is currently impossible to determine what it is made of.

The cylinder wall is very thin, but about 5 mm. Through the pressing and beating test, you can feel that glass-like hardness, there is no toughness at all, and from the feedback of the beating sound, it is clear and sound, it is indeed a bit like beating The sound of hitting glass.

What made Chen Xian curious the most was this layer of black.

Like this kind of special black with extremely low reflectivity and uncommon, it reminded him of Vantablack, a special product of a British scientific research company that he had seen in the documents. The Chinese name is also known as carbon nanotube black body.

This special substance is the darkest known substance on earth. It can theoretically absorb nearly 100% of electromagnetic radiation in the visible light band. In other words, it can absorb most of the visible light, and its reflectivity is almost negligible.

"If I remember correctly... the black body of carbon nanotubes is used as paint..." Chen Xian stroked the edge of the water tank and muttered: "Could it be that this water tank is coated with a layer of paint..." This substance?"

After studying the cylinder for a while, Chen Xian couldn't come to a definite conclusion. In desperation, he could only turn his attention to the six black rubber tubes.

Those pleasant liquids flowed out of these tubes. The tubes looked nothing special and felt ordinary to the touch, much like the common hoses used to transport fluids in hospitals.

At this time, Chen Xian suddenly recalled the mechanical roar he heard before, and subconsciously lowered his head and glanced at it.

Is there some kind of machinery under this tank?

Judging from the arrangement of the rubber pipes, it does lead to the bottom of the water tank... What's underneath?

The previous liquid left a deep impression on Chen Xian.

When immersed in those liquids, he got the kind of feedback that he seemed to be back in his mother's arms, which made Chen Xian unable to control his thirst for knowledge at all, and had an uncontrollable and extremely strong curiosity about their origins.

Chen Xian dragged the water tank tentatively and quickly came to some conclusions. The density of the water tank should be very high, and the total weight should be between 400kg and 500kg. Then contact the previous one. Knock feedback... This water tank might be made of glass.

When Chen Xian completely removed the behemoth, the six rubber tubes connected to the inside of the cylinder were also disconnected and fell to the ground.

Facts have proved that Chen Xian's practice of removing the water tank is completely correct. If he does not remove the water tank, he will not be able to find those things hidden at the bottom of the water tank.

There was a piece of golden-yellow metal that seemed to have been melted by high temperature, as well as two broken and blood-stained forms, but the most important thing was... Chen Xian found a strange entrance.

It's a metal door that flips up.

The door was unlocked, and there were six small holes on the edge from which those rubber tubes came out.

With a curious mind, Chen Xian did not rush to study the door, but first picked up the things scattered on the ground.

Let's talk about the metal first.

In terms of touch and texture, it is no different from ordinary copper metal. Chen Xian suspects that it is just some kind of part or scrap. It seems that it has lost its original shape after being smelted at high temperature, so he can only guess, but cannot conclude. What exactly is this.

Look at the other two tables.

One of the forms was completely stained with blood, and the font was so blurred that it was unrecognizable, and it had no research value.

"March 1, 08:11 - Maintenance Department: Zheng Gang."

"The maintenance work of the nutrient cabin has been completed, and no damage to the cabin has been found. The continuous liquid leakage has been reported to the superior and filed in time. The logistics personnel have started to replenish the cabin with nutrient solution for the third time. complete."

"March 2, 04:01 - Maintenance Department: Zheng Gang."

"Comprehensive overhaul of the nutrient cabin has been completed, and it has been confirmed again that the cabin is not damaged, but the cause of the leakage has still not been found. The fourth time to replenish the cabin with nutrient solution, the current replenishment progress is 12%."

"March 3, 05:24 - Maintenance Department: Zheng Gang."

"The nutrient tank leaked again, and the cause of the leakage was still not found in the second comprehensive overhaul. The application has been reported to the superior to replace the new nutrient tank, and the nutrient solution has been replenished to the tank for the fifth time. The current replenishment progress is 1%."

On the blood-stained form, the only recognizable contents were these lines, which looked like some kind of punch card or temporary record.

Nutrition cabin?

Chen Xian put down the form in his hand and turned to look at the black water tank beside him.

"Could this be the nutrition cabin mentioned in it?" Chen Xian looked at the water tank dubiously, and then looked at the slightly scribbled fonts on the form, feeling a little confused, "If this is the case... those black liquids Isn't it just nutrient solution..."

The nutrition cabin has never been touched before, and have only seen some prototypes similar to nutrition cabins in science fiction movies, but no matter what the shape is, its function will not change.

According to the concept of the nutrition cabin in the movie, it is a special container for storing the human body. Even if the living people in the nutrition cabin do not eat or drink, the nutrient solution provided by it can fully meet the energy required by the human body, just like a movie Most of the nutrition cabins in it are used to heal wounds... Could this large water tank also play this role?

Chen Xian flipped through the form puzzled, and felt that the water in this mental hospital was getting deeper and deeper. How could there be a bottomless feeling?

Just when Chen Xian was thinking about this, the girl suddenly stretched out her hand and took the form away from him, tilted her head and looked at it seriously, she didn't seem to understand much, and she folded it and threw it aside.

"Hey, don't throw it away!" Chen Xian hurriedly bent over to pick it up.

The moment he picked up the form, the girl took the opportunity to take away the lump of copper-colored metal in his hand, as well as the identity card that belonged to her, and Chen Xian was caught by surprise.

What the hell is going on with this girl?

How can you be so skilled at stealing things?

"Give it to me." Chen Xian solemnly opened his palm to the girl and looked at her seriously, "It's better to keep these things here, I'm afraid you will lose them accidentally."

The girl didn't know if she understood Chen Xian's words, she tilted her head and looked at him for a while, her eyes blank.

"Come on, give it to me."

Chen Xian kept his tone as low as possible so as not to irritate this girl whose mental state was unknown. But it turned out that no matter how gentle his voice was, the girl just smiled stupidly and didn't return the thing to him.

At the same time, a painful moan suddenly came from the corner of the room.

"I just...Did I get knocked out by something..."

That's right, Fatty Huo woke up at this juncture.

I saw the fat man covering his head and moaning, with the words "pain" written all over his face, as if he was still confused when he just woke up, his speech was intermittent, and his eyes could not be opened.

"Little... Xiao Chen, are you still there..."

That kind of humming and groaning sound, both resentful and long, can be used to dub horror movies.

"I'm not going to die..." Fatty Huo woke up a little, slowly opened his eyes, and his tone suddenly became tense, "Why is it so dark here... "

black?

Black is right.

Chen Xian muttered in his heart, his expression more nervous than Fatty Huo.

When he heard Fatty Huo moaning before, Chen Xian turned off the only flashlight and dragged the girl to hide beside the big water tank.

"Well?"

The girl looked at Chen Xian strangely, as if she didn't understand why he did this.

"It's going to be troublesome..." Chen Xian secretly observed the situation on Fatty Huo's side, and regardless of whether the girl could understand her words or not, he carefully warned her, "You must not come out. sound."

It turned out that the girl didn't understand Chen Xian's words at all, and instead squatted on the ground and groped for a while, for fear that Fatty Huo wouldn't notice it.

She groped for a while on the ground, and soon found the metal door previously blocked by the water tank.

Without waiting for Chen Xian to stop, the girl grabbed the concave door handle and pulled the metal door open with a clang.

"Hey! What the hell?!"

Fatty Huo was so frightened that he called out. It was already dark here, and he couldn't even see the situation with his fingers outstretched. In addition, he didn't know where Chen Xian was.

In fact, it's not that he is timid. After experiencing all the weirdness of this mental hospital, who can not be afraid of being suddenly thrown into the dark by a person?

"Keep your voice down!"

Chen Xian suppressed his voice and did not dare to shout, and looked back in a hurry to find out...

The girl is gone.