"No, there's still hope." Yu Lin's joyful reply, accompanied by a tooth-aching tremor, came from the center of the square in the distance, and became louder as the ruined platform rose. Everyone subconsciously covered their ears, but the sound of sour teeth still penetrated deep into their ears, and strangely, Yu Lin's voice also came.

"Professor Yu, can you turn off this sound?" Several people living in the middle of the square frowned and said, "Although this sound is not particularly unbearable, it is still uncomfortable for a long time. ”

"I'd love to turn it off, but what if I told you that with this sound, we'll be able to block out the minds of those people in the picnic area?" Yu Lin controlled the wheelchair and slowly drove towards Zheng Kai next to the warehouse, on the way, everyone noticed that there was a white spar on the armrest of his wheelchair covered by an iron box that shimmered with green light, "I went down and lifted the permission, you can enter it safely." ”

"Thank you, Professor Yu, but are we going to talk in this way all the time?" Zheng Kai's eyelids couldn't stop, "If it goes on like this, my spirit will collapse." ”

"It's also a last resort." Professor Yu sat in front of the warehouse, looking around at the nearly 1,000 people in the square here, "And, as I went underground, I found a second piece of good news, which can solve our energy problem, which is why I have to turn on this device all the time." ”

"That is, the underground can be illuminated?" Hearing the news, questions arose, "Can you open an underground plantation?" ”

"Yes." Yu Lin pointed to the spar on his armrest, "This spar contains strong energy inside, and it can be directly absorbed by the human body without any side effects." My guess is that it may be the condensation of some kind of material brought by the fall of the alien spacecraft at high pressure and high temperature. ”

"Fortunately, there are many excavators in the underground warehouse along the river city that they don't look down on, and we can use these hedrons to drive them, move the people here down, and then create a shield of divine thoughts in the excavation area." Yu Lin said a few words, and then began to give orders, "We should take advantage of this time of construction to accumulate strength." When the people above were ready to go to war with the picnic area, we went in and reclaimed our city bit by bit. ”

"But there are only a few thousand of us here, tens of thousands, hundreds of thousands of picnic areas, some capable people, and some defectors." Zheng Kai asked, he did not doubt the scientific research ability of the professor in front of him, but in the face of such a huge gap, he did not feel that he could win.

"I know what you think...... But come with me. Yu Lin looked at the disbelieving expression on Zheng Kai's face, his original enthusiasm was also extinguished a little, and when he turned around again, he saw that thousands of people in the square were staring at him, some believed, some turned their heads, or turned around, and the younger children looked at him with doubts and reverence.

“…… Something impulsive. Only then did Yu Lin realize that he was carried away by the discovery underground, and smiled bitterly, "Zeng Xing, Sun Shifang, when Zheng Kai and I go down, you are responsible for managing it...... By the way, give this stone to the person in charge of the energy and let them connect it, so that when we come up again, the power supply here should be restored. We'll also be able to filter water and produce food much faster. ”

Yu Lin's fingers were slightly forced, and the metal block on the armrest easily fell off, and the sound that originally echoed in everyone's ears disappeared immediately, making people feel a lot more relaxed. After Sun Shifang took a long breath, he beckoned and grabbed the stone in his hand.

"Come with me." Yu Lin said, Zheng Kai also habitually pushed the wheelchair, and then he noticed that it seemed to be affected by the previous picnic area, most of the older people basically have leg diseases, and after inhaling too much gas in the picnic area, there are still many paraplegics in the high and lower positions.

In the medical room, the sound of people crying can be heard from time to time. That's because after the gas spread in the picnic area, most of the elderly could not bear the physical damage caused by the pollution, and after struggling and suffering for several days, the family mourned after death.

Zheng Kai could also notice that the tired medical staff were constantly sending the body out of the medical room, and discussed what to do in the company of family members. In this embarrassment dungeon, there is no place to bury at all.

A thought-provoking silence spread, but when the two came to the center of the square, Sun Shifang and Zeng Xing also took the stone to the room in charge of energy. As the two of them sank, faint exclamations began to echo, and the lights that had been silenced began to light up again, making people squint their eyes, and the ventilation fans began to operate at high power, delivering metal-smelling, but fresh enough air.

The familiar light overhead and the chatter faded away, the scale of depth in front of them quickly fell, and several doors of different styles flashed in front of them. When the white ruler rose to 891 meters, the platform under his feet became a little smoother.

"This is the Underground Research Institute?" Zheng Kai looked around, but didn't see any doors, "Or Professor Yu, the elevator is broken?" ”

"It's not bad, that's how the underground research institute was designed." Yu Lin pointed to the 33-degree wall to the northeast, "Go here." ”

"But this is the wall?"

"Don't worry, that's where I just came from." Yu Lin heard Zheng Kai's question and comforted him.

"Optical camouflage? Hypnosis? Optical illusion? Zheng Kai threw out one question after another, but he still pushed the wheelchair at a slow speed, anyway, at such a slow speed, even if it touched the wall, it would not cause any damage.

"It's fine, but it's the same when I first entered." Yu Lin watched Zheng Kai carefully push his wheelchair to the wall, and when he carried himself forward at a slower speed, he instead stretched out his wrinkled hand and plunged directly into the wall.

"Huh?"

"We humans get a lot from the picnic area here." Yu Lin turned his head sideways and said to Zheng Kai behind him, his fingers were still shaking in the wall, as if stirring the stream, "Zheng Kai, have you noticed that the places that have been polluted by the picnic area are basically showing signs of life." ”

"Yes." Zheng Kai let go of the armrest of the wheelchair, slowly walked to the wall, and also stretched out his hand to touch the wall.

The moment the fingertips touched the wall, it was not rough or stiff as I remembered, but more like sticking into the ...... In a puddle of jelly?

"We've speculated before that this is a way for extraterrestrial life to survive, or a way for them to perceive the world." Yu Lin said, patiently watching Zheng Kai keep getting closer to the wall, trying to grab the viscous liquid with his fingers, "The members of the exploration team who entered the picnic area, they all told that they sensed too many things in an instant. And the ground will squirm, and some life will be more active......"

"So I wonder if they're living in liquid form, and every aspect of their lives, works in that way." Yu Lin said, his words were flat as if he was returning to a university classroom, giving a lecture to Zheng Kai, "Imagine this kind of creature in a pure liquid state. In order to perceive more of the world, they divide themselves into countless small cells, covering every corner of the world. So that they can instantly understand everything about this world. ”

"At the same time, they need to reinvent the world just as much as we do. We have tools, and their tools are themselves, and they attach to the building, they attach to the stones, they change those stones, they change the refractive index of these objects, so that the building looks transparent. They clinged to the earth, causing it to loosen like some kind of living maggot. ”

“…… Professor Yu, do you mean that we humans are also possessed by aliens? When Zheng Kai heard this, he withdrew his hand with some disgust, and looked at it with the light to see if there was anything stained on it.

"What's the matter, there are thousands of microorganisms in the air we humans breathe, and there are also many organisms in our mouths and intestines." Yu Lin smiled, pressed the forward button of the wheelchair, and easily walked through the wall.

“…… That's right. As a researcher, Zheng Kai learned all this knowledge when he was in college, but it is still a little uncomfortable to really feel or touch this creature and imagine that this creature is in his body. Gritting his teeth and closing his eyes, he passed through the curtain of water and came to a completely dark space.

"Professor Yu?" As Zheng Kai subconsciously inquired, he found that a faint glow began to flood the walls around him, and this frequency seemed to be extremely similar to what he had just said.

"I'm here, turn on the lights." Yu Lin's voice came from the other side, and with the sound of turning on the light, a gentle green light filled the entire space like a wave. It is also through this that Zheng Kai can see the general layout of this underground space, as if it is stretched out like a tunnel with chopsticks, with a width of about six meters and a height of about six meters, some tables, chairs and benches are randomly scattered in the tunnel, and documents are also placed, as if the researcher has not left at all.

In addition, there are some things that I have never seen before are displayed in different transparent covers, or they are discarded in the corners of the walls.

"Was this underground research institute a long time ago?" After the light came on, Zheng Kai noticed that the supports of the table and stool had begun to change, such as becoming transparent, or slowly wriggling like flesh and blood.

"To be precise, this wasn't an underground research institute in the first place." Yu Lin drove forward in a wheelchair, while Zheng Kai couldn't help but look at the many speculations about the picnic area on the walls, as well as the photos of the magical objects that had been posted. The names of these objects are too tempting, and he understands that these things are only beautiful on the surface, and once they are used, they will have irrepressible sequelae.

"What's that, an underground tunnel?" Zheng Kai looked at the back of Yu Lin's bald head, and a slight smile relieved him.

"I remember that when you test your abilities along the river, you will use a round ball, right?" Yu Lin said.

"Yes, but ......" In an instant, Zheng Kai felt that his scalp was poured with a spoonful of boiling oil, he remembered that the basic parameters of this round ball were a very perfect circle, with a diameter of exactly 6 meters, as for the volume, the circumference could not be measured at all, coupled with the characteristics of gravityless suspension, it was the object of study at first.

It's a pity that after more than ten years of research, there is nothing, just mathematical measurements.

"That's right, this underground tunnel is where this ball was found." Yu Lin looked at the smooth four walls, "When we found out, it was this ball moving underground at a slow speed. You also know that this sphere can absorb any energy. Underground minerals, stones, were also absorbed by him. ”

"The weirdest thing is that we can't find out how this sphere came to this place close to 900 meters underground, as if it suddenly appeared here." Yu Lin sighed, "But too many resources have been spent, and in the end, it can only be determined that it is harmless, and some people even speculate whether it is a ball, bearing, or the most common tool on an alien spaceship, or even a children's toy." ”

"Later, the renovation of the underground research institute along the river was to use the space excavated by this ball to pile up a lot of things." Yu Lin pointed to the end of the passage, "Most of the dangerous things have been handed over or sealed, and no one knows where they went. But what can be conducive to the development of the city, the construction is kept. ”

"What gave you so much confidence before, right here?"

"Yes, first of all, hedrons." Yu Lin stretched out his hand and pointed to the spar that shimmered with white light in the distant passage. These hedrons grow taller and taller as they go further, with the smallest being half a meter tall and nearly a meter wide. Huge grows directly from under the ground, against the ceiling, making the originally green, shaggy passage look a little cramped. But the first time Zheng Kai saw it, countless inspirations did burst out in his mind.

This kind of spar was encountered when he was doing experiments, but it was only 0.1 grams per application. It is used to test the stimulating effect on biological cells.

And the camera that followed the whereabouts of the two passed this scene to Bing Shijue in the distance. Those huge hedrons made him pull up the quilt in an instant, covering his subconsciously open mouth. You know, he once found enough ore under the Shangjiang settlement, but it was no bigger than a football.

But now below the river city, the amount that can be seen at a glance is better than what he absorbs and feeds to the spaceship.

"And...... I know that inside this hedron is a camera that can absorb energy, and the existence of this camera means that there is a huge spaceship at the foot of the city along the river? Bing Shijue tried his best to control the rate of his breathing, and dozens of different conjectures burst into his mind.

Under Yanjiang City, Zheng Kai used medical technology to restore his dislocated jaw, because he clearly remembered that the energy contained in this spar was beyond people's logic.

Nowadays, with the help of alien technology, humans have been able to compress the battery enough, basically the battery in everyone's mobile phone is close to 10,000 milliamperes, and the batteries used for those explorers in the picnic area before are close to 30,000 milliamperes, as well as small solar panels, and equipment that absorbs the gas in the picnic area and converts it into energy.

But the 0.1 gram small spar actually contains energy that can make ordinary families use it for a month. Of course, this is in perfect excitation, without any waste. In the test, the mice, or living creatures, can only absorb a little, and most of it is wasted.

"Our current conversion rate is about 3%, and even then, the hedron here is enough to use for a long time, but we must not tell a third person." Yu Lin's eyes were also impatiently excited, and it was precisely because of this that he would say such excited words when he took the elevator up, "You also know the nature of this stone, like a sugar tablet, you can break it by hand, it will become soft when you rub it gently, and if you smash it, it will become powder, but as long as you use a little more force, it can be re-polymerized." ”

"That's the first thing that gives me confidence, but it's also something that needs to be tightly controlled, and we still have to use solar panels and the old machines that absorb gas from the picnic area and convert it into energy." Yu Lin said, slowing down the speed of the wheelchair and burrowing through the whitening hedron passage.

"Take 10 grams each time, once every six months." When Yu Lin spoke, he couldn't help but take a big breath. The air around the spar is completely unpolluted, and it can bring enough vitality and energy to people between breathing and breathing, "Maybe in the past history, we really had immortal cultivators who glanced at Bing Shijue." Don't eat grains, suck wind and drink dew, ride the clouds, and fly the dragon......"

"But Bing Shijue has no news." Zheng Kai sighed, and Bing Shijue, who witnessed this scene in the distance, could only sigh. His strength is much stronger now than when he left Yanjiang City, but he is not strong enough to be able to do anything and ignore the status quo.

"No news is the best news." Yu Lin said, gently pushing and bending those inclined spars with his fingers, and the wrinkled hands also shed some dead skin and grew new skin, "Zheng Kai, you shouldn't be greedy enough to want to possess the spars in this place." ”

"I want to, too, but I know I can't handle that energy." Zheng Kai was not envious of the changes in Yu Lin's fingers, because he knew that this kind of cell replacement on the body was only a symptom, and the lifespan of a person would not change. To use a rough analogy, it's like tearing off a person's original skin alive and replacing it with a new one, which will not affect the inside.

Except, of course, those who are able.

And none of them are capable people.

"Very good, although the mystery of why the world is divided into capable people and ordinary people has not yet been solved, but at least for now, under the condition that you and I can keep it a secret, and the protective measures under the underground of Yanjiang City are still reasonable, this city can continue to support." After a short time, Yu Lin's wheelchair walked out of the tunnel where the spar grew and came to a swamp-like underground water flow.

"But Professor Yu, why don't you do it yourself, if you keep it secret, one person is better than two, right?" Zheng Kai glanced at the viscous liquid and looked up and asked.

"One person's power is always limited, and with only one person, it's easy to fall into paranoid thoughts." Yu Lin said, "You see when I came up from the elevator before, wasn't that the case? ”

"Yes......" Zheng Kai of course remembered the sense of arrogance between Yu Lin's eyebrows when he came up, as well as the vanity of control over everything in his words, "So you need an overseer?" ”

"I'm an old man, and I also need a young man as an assistant." Yu Lin smiled and pointed to the swamp in front of him, "Do me a favor and take 10 ml of liquid from the container." ”

Zheng Kai nodded, looked at the container under his feet, and when he squatted down carefully, Bing Shijue fell into thought in the distant underground. Professor Yu is right, he just has an energy crystal that does not belong to him for the time being, and there is a liquid in front of him that he doesn't know what to do, so he will fall into a frenzy.

Admittedly, his purpose was correct, he wanted the people of the underground not to continue to live in the dark, but to be able to return to the surface. But the decisions that may be made on impulse can hurt many people.

Not to mention Bing Shijue, he had no doubt that he was now able to directly destroy the settlements in the picnic area, or some remote areas in the city. But what happens after that, is it all damn people who live in the picnic area?

He couldn't make that decision.

While thinking, Zheng Kai also took a glass of liquid and handed it to Yu Lin's hands.

"What is this liquid?" Zheng Kai noticed that unlike his own caution, Yu Lin poured the liquid into the palm of his hand very easily.

"According to my tests and estimates, it should be a weapon of a fallen alien civilization." Yu Lin said, and the liquid in his hand quickly condensed into the shape of a firearm, but the color was still green, but the texture was close to plastic.

"Can you change your form at will?"

"And it's powerful." Yu Lin motioned for Zheng Kai to step aside, and his weak arm was aimed at the puddle of viscous liquid. With the slight touch of his fingers, the liquid in front of the two suddenly exploded, and then became calm again because of the mutual pull between the liquids.

"No sound?!" Zheng Kai only heard the sound of these liquids stirring in his ears, but he couldn't hear any sound of shooting.

"Yes, and the damage range is about a circle with a radius of 1 meter." The firearm in Yu Lin's hand softened into a dry, leech-like thing after it was fired, slowly flowing down his arm, and finally entering the swamp, "The disadvantage is that it can only be used once. But you can continue to come back here and start resupplying. ”

"And if you add a spare?" Hearing this, Zheng Kai's thoughts were also ignited, looking at the green river like a stream in front of him, and the firearm that could have such power with only 10 milliliters, "...... We can retake the city along the river. ”

"So the point is how we're going to survive the indiscriminate bombardment of the picnic area, and how we're going to protect these things from being taken."

"That ......"

The world in front of him suddenly turned red, and Bing Shijue, who had chatted with Lu Yun, understood that this was the news of a major event in the picnic area, so he instantly cut off contact with the camera, got dressed as quickly as possible, came to the room, and watched the floor support him up.

But the floor, and did not rise.

The wall suddenly unfolded, and a screen appeared in front of his eyes.

And on the screen, he only saw the huge mushroom cloud in the documentary.

Growing.