Feng Luotang and the four of them did not forget the agreement between the Mid-Autumn Festival and the bricks.

If you hold a normal shark tooth, using the Dream Charm may cause you to suddenly appear at the bottom of the sea.

But the bricks give Feng Luotang their shark teeth differently. It was a hideous tooth pulled out of a huge shark skeleton in the lobby of the Biology Building of the North Nether Base. The shark is said to have been hunted by the hands of the base's commander-in-chief, Brick.

When Feng Luotang, Shao Yi, Lin Yu and Long Xuanchen appeared in this lobby, they looked at the shark teeth in the palm of their hands, and then looked at how tall the big shark was, which was more than ten meters long, opened their mouths, but they didn't speak.

"Little fragrant pig!" Hearing the shout, Feng Luotang turned his head suddenly, his face embarrassed.

She saw the gentle Lady Wind, standing in front of a door on the side of the lobby. Feng Luotang's mother, although she is nearly forty years old, looks outstanding and is still stunning.

She smiled kindly and beckoned affectionately. Feng Luotang, who was called "Little Fragrant Pig", snorted angrily and walked towards his mother with a few people.

"If you call me by my nickname again, I'll ......" Feng Luotang deliberately showed his anger: "Call your nickname too!" ”

"Okay, good!" Feng Luotang's mother hurriedly coaxed. Feng Luotang's nickname for his mother was "Windmill" before, which didn't sound bad, so Ms. Feng didn't mind.

"Dad has been counting the days and waiting for you to come. Come with me. Feng Luotang's mother led the four of them through the long corridor and pushed open a bright glass door at the end.

As soon as the door opened, the four teenagers were all stunned.

What they saw was a huge patio with ten football fields in size. The height of this patio is at least two hundred stories high. At the top is a thick arched dome like ice.

The dome is filled with soft light, as if the sky is full of light, clear and natural.

The huge patio is bottomless, and all around it is a circle of neat and bright metal corridors that rotate continuously, making people dizzy.

There are at least 100 high-speed glass elevators in the corridor, constantly running up and down, emitting a very low humming sound of electrode drives.

"Welcome to the North Underworld base." Feng Luotang's mother opened her arms and made an elegant turn, pointing to the magnificent patio.

"This is the central hub access of the base. Regular flights to the base, cruise fighters, UAVs are all lifted from here. ”

"What's down there?" Feng Luotang pointed to the unfathomable bottom.

"It's the deep sea. But above the seawater, there are lifting defense platforms. ”

"Why is it so deep?" Lin Yu asked.

"Because...... I'm not going to tell you yet. After a while, we'll see if you can guess. Feng Luotang's mother pretended to be mysterious and said.

At this time, a person walked through the circular corridor. He was not tall, wearing an iron-gray suit with a white coat and a pair of gold-wire rimless glasses.

There was always some childishness on this man's round face, but judging by his age, he was at least in his thirties.

"This is Dr. Liao." Feng Luotang's mother introduced: "He is our all-round doctor here, a jack of all trades. Let Dr. Liao show you around, and we'll talk later. ”

Dr. Liao took a few of them, and the sightseeing usually walked through countless circular passages. Lin Yu looked at the dome and asked strangely, "Shouldn't it be night now?" ”

"That's artificial daylight." Dr. Liao replied. Then he said:

"It's a coincidence that you're here today. September 24 is the day when the polar day and the polar night of the North Pole change. There will be a long dark night today. And you're lucky enough to see the moon on the horizon today. ”

"Actually, although there are more than 150 polar nights a year, you don't often see the moon, do you know why?" Dr. Liao asked questions as if he were a graduate student.

"I know that." Shao Yi said with confidence: "The white plane of the moon's orbit plane and the ecliptic plane of the earth's orbital plane have an angle of 5.145 degrees. Due to the equatorial uplift......"

Shao Yi had already seen the apricot eyes of the scumbag Feng Luotang glaring angrily. “…… Therefore, the angle between the white track and the Earth's equatorial plane will vary from 28.6 degrees to 18.3 degrees. ”

Shao Yi's voice became smaller and quieter, "So in the North Pole, even in the polar night, the moon can only be seen for less than 15 days in a month, and the moon moves below the horizon the rest of the time." ”

Dr. Liao is satisfied. Feng Luotang pushed Shao Yi: "Isn't Xueba amazing?" Young master, you're the best, but can we not drag it like this? ”

Shao Yi scratched his head a little embarrassed and said, "Anyway, I am really lucky to see the full moon today." ”

Lin Yu and Long Xuanchen both glanced at him approvingly.

Lin Yu turned to Dr. Liao and asked, "But this dome is always on, and there are brilliant lights everywhere in it, it must consume a lot of energy, right?" ”

Dr. Liao shook his finger mysteriously and said, "I'll show you a rarity." He pushed open a door not far away, and Feng Luotang noticed that there was a large signboard on the side building "Ministry of Energy".

The room was like a laboratory, with a lot of equipment and equipment, but no one.

Feng Luotang and the others were in a huge thick glass jar and saw some crystals like ice cubes, each grain glowing with silver-blue light.

Lin Yu's voice sounded calmly: "This device is a transparent low-temperature pressure tank, and the pressure is at least thirty atmospheres or more. High-pressure and low-temperature crystalline energy ,...... Is it 'combustible ice'? ”

Shao Yi and Long Xuanchen's eyes were full of surprise, while Feng Luotang looked confused.

"That's right." "Where we are now is deep into the ocean floor. Just over 2,000 meters below our feet, there is a storage layer of combustible ice up to 800 meters thick. ”

"The North Underworld Base has been mining and utilizing combustible ice with unique technology for more than 50 years, which is very mature and safe." Dr. Liao was a little smug in his words.

He was just about to continue explaining in detail when suddenly a sharp alarm sounded in the building.

Dr. Liao looked calm and said without panic, "Come with me." ”

He led the four of them into the depths of the circular corridor, opened a thick metal door with a turntable handle, and led them inside.

"This is our submarine air defense equipment here. The alarm just now was supposed to be an air strike. Dr. Liao took off his glasses, which had been fogged by the sudden drop in temperature, and slowly wiped them.

"Why are there still air strikes?" Feng Luotang asked puzzled.

"I don't know exactly what to do. In the past two months, it has been attacked by drones several times. Dr. Liao said calmly.

Suddenly, a deep tremor came from the thick metal door.

"Our interceptor fighters took to the skies. This custom-built large fighter is equipped with a laser cannon, and the projectiles within a two-square-kilometer radius have a 100 percent hit rate. Dr. Liao's explanation was bland.

"Although two of these attacks also blew up the polar dome and caused minor damage, they were all attempts to come back and forth. I really don't understand what kind of enemy is doing this. Dr. Liao added:

"The satellite guards around the North Underworld base can have as many as one hundred and fifty fighters in the air at the same time. In several battles, we also lost more than twenty fighters. Although these are unmanned fighters, they are expensive. So the base loss is also quite large. ”

"What exactly is their purpose?" Lin Yu asked.

"It should be combustible ice, or some other base-specific technology. Or is it just a provocation? I still don't have a clue. Dr. Liao put his hand on the thick metal door.

Wave after wave of rumbling tremors could be clearly felt on the metal door. It seems that the battle outside is not easy at all.

"A base as big as the North Underworld needs huge financial support, right?" Shao Yi, the rich second generation, asked a sensitive topic.

Dr. Liao looked up, his lenses reflecting the light of the emergency light. He glanced at Shao Yi who was questioning with a smile: "You want to ask me, what is the base supported by?" The energy industry, of course. ”

"The North Underworld Base has been developing oil since a hundred years ago, and now it is developing this combustible ice solid natural gas. We deliver through several countries in the North and are actually one of the largest energy suppliers in the world. In addition, the periphery of the base is also home to fishing, tourism, and high-tech biopharmaceuticals. ”

"Biopharma? That's what my dad did. Feng Luotang said.

"You're right." Dr. Liao said happily: "Dr. Zhuan is indeed an expert in this area, not only an expert, he is a genius. He just sold two biopharmaceutical technologies, which was enough to renovate our place. ”

"So valuable?" Feng Luotang said: "Then we have to decorate our house first!" ”

While a few people were talking and laughing, the movement outside seemed to stop. The warning red light in the bomb shelter went out, and the green light next to it came on.

Dr. Liao led the group back to the central patio. Several people looked up at the dome, and sure enough, the magnificent dome resembled a huge block of ice, with a few white smash marks.

"Well, it's good they didn't get in. But this time, the repair of the dome will take more than half a month. ”

Dr. Liao then took several of them to visit the lobbies and exhibition rooms of the Ministry of Military Affairs, the Ministry of Science and Technology, the Ministry of Medicine, the Ministry of Biology and the Ministry of Energy.

Several people were even more amazed by the grandeur of the base and the strict organization of various departments. Until Feng Luotang's mother intercepted them on the circular passage and said happily: "Finally, you can be idle for a while, Dad called you to go." ”

Dr. Liao smiled and nodded, and left. Several people followed Feng Luotang's mother, took a high-speed elevator, and rose one hundred and ten floors in an instant, arriving at a one-story building very close to the dome. There are no signs hanging here.

Feng Luotang's mother explained with a smile: "The general headquarters is the closest place to the ground, but it is also the place that can be closest to the enemy and the most threatening to the enemy. Come on in. ”

The floor-to-ceiling doors here are heavy and heavy. Feng Luotang's mother pressed the button, the door slowly opened, and several mermaids entered.

The hall is lit up in soft yellow, and a huge sand table is almost white, and it looks like the entire Arctic Circle is laid out in it.

There are several rooms behind the sand table, one of which is still lit. A few people walked in, and finally saw the bricks that had not been seen for a long time.

Brick looked up, looked at them and said, "How's it going?" Shock. Welcome to the North Underworld Base! ”

"Is this the same slogan as 'Beijing welcomes you'? My mom said it all over again. Feng Luotang jumped and ran over.

"I said bricks, after so many years, you have such a fun place not to bring me! I'm angry! Feng Luotang jumped in front of his father's eyes and pouted.

"Don't be angry! Not angry, not angry. Good girl is not angry! "The bricks are all over the place.

Feng Luotang said coquettishly: "How can you not be angry? In front of my brother, my friend, so shameless! For more than ten years, you haven't missed a little rumor. Bricks, you're excessive! ”

Brick smiled and snorted Feng Luotang's long hair, and said, "Isn't this inviting you, your brother, and your friends are here?" He deliberately added the word "friend".

Feng Luotang glanced at Shao Yi with her eyes, and for some reason, when her father said "friend", a blush flew on her face.

Shao Yi was also a little embarrassed, hehe smiled, and said, "Uncle, you are really magnificent here!" ”

Brick laughed and said, "Okay, let's have a little bit of food, and I'll tell you about the history of the North Underworld Base." He also had a sumptuous lunch box brought in.

"Have you heard of the Great War with Chaos and the fall of Buzhou Mountain?" Brick asked.

Feng Luotang and the others glanced at each other and nodded. "Master Chengyi told us." Lin Yu replied.

"O Yun Zhongjun. He may be the person who can't forget the battle the most except for Xuzen. yes, we have to start from the beginning. ”

After thousands of years, the ending of the great war with Chaos finally precipitated into history. But what there is no historical record is that after the battle, a dragon clan left the land of China and fled to the north of the extreme north.

The land where the North Underworld Base is now located is the new home pioneered by the ancestors of the Dragon Clan.

When they first arrived, life was extremely difficult, not only to survive in the cold of the far north, but also to take care of the two-winged dragon that came with them.

The two-winged dragon was originally born in the northern underworld, and was transformed by the giant kun for thousands of years. However, the Arctic is poor, and the lack of food for hundreds of years has completely wiped out the giant kun. The current whale is less than one-twentieth the size of the original giant kun, and it is no longer able to turn into a dragon.

Ying Long's people stayed here to multiply. The war with chaos has been passed down from generation to generation, and it is unforgettable, and it will never be forgotten.

After the war, Xu Chan stayed in the land of China and began to educate the people of the Central Plains. And the Yinglong people in the far north, in a place with poor resources, found another way to survive.

The dragons have buried their vengeance in their blood. Whether it is Xu Chan or this Ying Long clan, they all want to return to that battle of life and death through the time rift.

"You already know that time and space can be folded." Brick said solemnly: "I think Suzen has found a time rift. But he didn't work out. ”

For thousands of years, the direction of Xuzen's efforts has been to revive the dragon clan; And the direction of the efforts of the Yinglong people in the northern polar region is to find the most powerful weapon.

"This is the ultimate reason why the North Underworld Base has evolved to this day. So this base that you see in the North Underworld, it's actually a military base, and it's also a technology base. Brick raised his eyes and stared at the polar sand table in the hall.

"For nearly a thousand years, we have used all the accumulated wealth for the research and development of weapons, medicine, and energy, and while rapidly accumulating wealth, we are also constantly expanding the strength of the base."

"Then have you cultivated the Immortal Dao like Guiguzi?" Feng Luotang asked in a low voice.

"Stupid." The brick patted Feng Luotang's head: "There are people who don't want to be immortals, but there is more than one Lao Xuzen." ”

"Let's go. On the night of the Mid-Autumn Festival, I will take you to enjoy the moon together. Look at the difference between that bright moon and what you see on the land of Shenzhou. ”

The sound of bricks suddenly became brighter, and he called Feng Luotang's mother, took a few fox fur coats from her, dressed them one by one for several teenagers, and led them to take an elevator that reached the dome at high speed.

At the edge of the dome, there is a door that opens and closes automatically. A few people walked out, and when they looked back, they found that there was still an ordinary ice field behind them.

"It's the result of a combination of high technology and enchantment mysteries." Feng Luotang's mother explained: "In fact, this dome is made of the most advanced synthetic materials, which are ten times stronger than the hardest alloys, and have many functions such as transparency and heat preservation. ”

Under the cover of the barrier, the dome is indistinguishable from the surrounding snow and ice. The magnificent and shocking Northern Hell Base just now was quietly hidden under this vast ice field at this time.

Several people stood in the ice and snow, feeling the cold of the far north.

Everyone looked up, and in the western sky, three or two long clouds reflected the dark red light on the horizon, and they still refused to disperse.

It was the last polar day. The sun has been unable to rise above the horizon, and only uses this ember-like afterglow to proclaim the end of the day for a long time.

The dark red and bright golden yellow intertwined with the sky, setting off the last bright color of the night sky.

The coming of the polar night is clear and clear.

In the eastern sky, a bright moon hangs low on the horizon like a white jade silver plate with clear ice, and in the Arctic sky with high visibility, it looks huge and beautiful, unstained with dust.

The clear moonlight illuminates the vast snowfield, reflecting the unreal illusion of the world.