Chapter 428 We are back, no one is missing!

"In addition, we believe that this underground fissure is shrinking very slowly."

"In theory, matter is indestructible, and some components are eaten and pulled out again. But this big fissure is indeed shrinking slowly."

"It's just that the volume of rock, soil, and sand and gravel here is too large, and most people can't notice it. Perhaps, after tens of thousands or hundreds of thousands of years, it will disappear."

The crowd chatted while walking, and sprayed a lot of gas odor along the way, making the whole way smelly.

This adventure was relatively smooth. We didn't encounter a large number of Zerg troops. The underground alliance also conducted a detailed investigation of the surrounding terrain.

It took everyone half a day to easily reach the surface.

Climbing up the cliffs, bathing in the bright sunshine, and recalling the more than one month underground, there is a sense of rebirth.

Or... the time to pick mushrooms is good!

Because the altitude here is too high, the gray and white clouds are directly under your feet.

And directly above the sky, it was almost reaching the legendary "Gangfeng Layer" where the airflow was extremely chaotic... According to the records of the Green Civilization, after breaking through the atmosphere, the idealistic radiation from the outside world was extremely chaotic, and even a serious spacecraft could not sustain life for a long time.

It was necessary to realize space technology and escape from this time and space to avoid the epoch disaster... But that was another higher-level technological route.

Looking down at the big crack, Lu Yuan seemed to be facing endless space and time, filled with hot magma and thick darkness.

This big crack was hidden in the dark side of the world, filled with unspeakable chaos.

A terrifying thought suddenly came to his mind: "[Insect] seems to be born from the corpse of [Monster]... Could it be that this is a dead [Monster]..."

This crack faces east and west, is tens of thousands of kilometers long, and thousands of kilometers wide. If it is really the corpse of a [Monster]... it is really beyond imagination.

Moreover, "the insects were born from the corpses of the monsters" was just Lu Yuan's guess, and the final truth could not be verified.

The crowd climbed over the hill and began to go down the mountain. After dozens of kilometers, they saw the "frontline investigation fortress" built by humans.

A flag with the sky city painted on it fluttered in the wind. It was the flag symbolizing the Green City.

"Hey - we are back!"

After more than a month, it was really touching to return to the familiar outpost.

People checked their physical condition in the safe house. Seeing the familiar people and things, Lu Yuan's tense nerves relaxed all of a sudden, as if he had unloaded a burden on his body.

The other human staff members were in a similar situation. One by one, they either jumped on the ground twice or breathed a sigh of relief.

Only the 48 members of the underground alliance shook their heads and were very excited.

The bright sunlight was indeed a bit dazzling for the underground races, and they were not used to it.

But as long as they put on a pair of sunglasses, they could block the sunlight.

Niu Ba shouted loudly: "This fortress on the surface is so magnificent!"

"Haha... I, Lao Niu, was a bricklayer a long time ago. Commander Lu, why don't you hire me to carry cement for you? I, Niu Ba, am the best warrior underground."

"Why don't you slowly move to the surface?" Lu Yuan asked, "With your technological strength, it shouldn't be difficult to build such a building, right?"

"Alas, there are too many bottles and jars, so I can't bear to leave them." The main person in charge of the team, Oshima Gang, shook his head.

Although the underground environment is not very good, the advantage is that the resources are really abundant.

The Underground Alliance has basically completed the goal of universal level 2, which is tens of millions of people. The difficulty is 100 times higher than that of the Sky City!

Where can we get resources on the surface...

Lu Yuan said that he could understand: "Alas, our Sky City travels all over the country, isn't it just to obtain resources... You actually already have them."

"Come, please come this way. This is just an outpost, and the rear base is thousands of kilometers away."

Humans have built a small airport here.

The plane was specially made, with no windows in the cabin and some special protective materials, so these underground people actually didn't know the specific direction of the human city.

Its speed was much faster than the "Sky Fortress". It traveled 6,000 kilometers along the way and arrived at the small sky city in almost 10 hours.

With a light "boom", the plane landed smoothly.

"Swish-" the cabin door opened.

Compared with the majestic underground fissure, the sky city is like a small, delicate stone, but it contains all the hopes of people.

After being away for more than a year, the city seems to have changed its appearance.

The foundation of the new urban area has been basically completed, and the area has expanded a lot.

The old urban area, the new urban area, the green mountain, and the coral island, these four areas together can easily accommodate the daily life of a population of one million.

Of course, the completion of the foundation does not necessarily mean that people can live there. The details of decoration, water, electricity, greening, etc. will take a long time, and the expansion of the population will also take time.

A large artificial glass greenhouse was built above the stump of the poppy tree - this was also planned long ago. This glass greenhouse can transmit sunlight and has certain defensive properties.

That is, the huge tree stump can no longer be seen with the naked eye from the outside world, and the safety of the poppy tree is fully guaranteed. In addition, there is a 2 square kilometer military zone and foreign exchange area on the periphery.

This "foreign exchange area" can facilitate the reception of some foreign guests and expose the secrets of the Sky City as little as possible.

Accompanied by a gentle "Jasmine" music, a lot of government officials have been looking forward to it!

There are also neatly arranged soldiers and hundreds of power armors, saluting together.

Several red banners are hung on the rail train: "Welcome the Underground Alliance to visit the Green City and create a brilliant and beautiful future together!"

Lu Yuan was the first to get off the plane and sighed deeply.

The scene in front of him made him feel a subtle touch in his heart. Give civilization to the years and life to time. Is the meaning of life for this moment? The joy of returning home in glory is like this from time to time?

He saw the tearful "maid lady", the immortal giant turtle with its head tilted up, and the old cat hiding in the crowd.

There is also the evil and crazy old wolf, with his tongue hanging down and his tail shaking like an electric fan! This old guy with a legendary journey is so intimate!

And... Little Mirage Dragon!

After a year, Little Mirage Dragon has grown up again, puffing out smoke and surrounding himself, as if he is a little shy.

But his bright eyes are as curious as ever - where have you, Old Lu, been for so many days?

And... countless familiar people.

Under the quiet and turbulent mood, there is only one word to describe this feeling - solid!

It seems that all of a sudden, everything has been put down.

Lu Yuan cleared his throat and whispered: "Hello, friends! We are back, no one is missing!"

"We have successfully completed the front-line investigation mission and made new friends!"

"Let us express our most sincere welcome to the visit of the Underground Alliance with warm applause!"

"Fire a salute!"

"Boom! Boom!"

The salute roared!

The applause was like a thunderstorm.

In such a grand reception ceremony, 48 representatives from 12 races of the Underground Alliance walked down from the plane with red faces.

They stepped on the red carpet, and there were human etiquette ladies around to give flowers.

This sense of ceremony was indeed done to the fullest - well, the Underground Alliance is a big moneymaker for humans, and it doesn't cost money to give some face!

The bull-headed chief grinned and said loudly: "Haha, you're polite, too polite."

"Underground, we didn't dare to fire cannons, we were so cowardly."

"Oh, there's actually a turtle there, and a group of ratmen, staring at us!"

"They really have many races here! Take us minotaurs in too, I can be your..."

"Be quiet! Don't talk nonsense!" Oshima Gang was anxious and quickly pressed a remote control button.

"Zi La!" Suddenly, high voltage electricity was generated on the bracelets of these cows, which made them numb all over, trembling and unable to speak.

This is the three rules that were made in advance. If the Minotaur tribe wants to be a diplomat, they must bring an electric shock device to prevent them from talking nonsense!

The Minotaur was a little sad and almost shed bitter tears.

The representatives of other races were much more reliable. When they got off the plane, they secretly observed everything here.

"This is..."

"Is it a city commonly built in the outside world... Can it really float?"

The sky city is divided into three layers: upper, middle and lower. There are many hollow designs in the middle. This is for lighting. At a certain time of the day, it can always get some sun.

Most of the residential buildings are embedded in the walls, which can avoid disasters well.

There are not many high-rise buildings, and the height is only 40 meters at most.

The number of carvings... is really a lot!

There are also huge sewer projects, rail transit, industrial factories, energy systems, reservoirs, warehouses, defense systems...

I have to admit that the devil is in the details!

For example, if the sewer is blocked, the lives of all residents will be affected.

There is also the greening of the city. This city is really surrounded by green plants. The lush vitality is so much that it is a bit unaccustomed.

And these details can only be perfected through practice.

If they also want to build a sky city, there are too many things to learn.

But how to say this knowledge... Humans will not take the initiative to sell it. After all, it involves civilization secrets and it is impossible to sell it.

But if you can learn some details through observation, people will not stop you.