Chapter 428 We are back, and there is no one missing!


    "In addition, we think this large underground crack is shrinking extremely slowly."


    "Theoretically, matter is immortal, and some ingredients will be pulled out again when eaten. But this big crack is indeed shrinking slowly."


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


    Everyone chatted and walked, and a lot of gas stench was sprayed along the way, making it smelly all the way.


    This time the adventure went smoothly. I did not encounter a large number of Zerg troops. The underground alliance also investigated the surrounding landforms in detail.


    Everyone took a long time to come to the surface easily.


    Climbing up the cliff and bathing in the bright sunshine, recalling the underground for more than a month, I feel a sense of rebirth.


    Still…it’s great time to pick mushrooms!


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


    And directly above the sky, it is almost reaching the legendary "Gangfeng layer" with extremely chaotic airflow... According to the documentary records of the green green civilization, after breaking through the atmosphere, the idealistic radiation from the outside world is particularly disordered, and even the serious spacecraft cannot maintain the survival of life for a long time.


    Space technology must be realized and escape from this time and space in order to avoid the disaster of the era... But that is another higher-level technological route.


    Looking down at the big crack, Lu Yuan seemed to face endless space and time, full of fiery magma and thick darkness.


    This big rift is hidden in the dark side of the world, full of unspeakable chaos.


    A terrifying thought suddenly arose in his mind: "The [worm] seems to be born from the corpse of the [demon]... Could it be that this is a dead [demon]..."


    This rift faces east and west, with a length of tens of thousands of kilometers and a width of thousands of kilometers. If it is really a corpse of a [demon]... it would be too much beyond imagination.


    Moreover, "[worm] was born from the corpse of [demon]" is just Lu Yuan''s conjecture, but the final truth cannot be verified.


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


    A flag painted by the city of the sky flutters in the wind, which is a flag symbolizing the green city.


    “Hey—we’re back!”


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


    People checked their physical condition in the safe house and saw the familiar people and things, Lu Yuan''s tense nerves suddenly relaxed, as if he had removed the burden on his body.


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


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


    The bright sunshine is indeed a bit dazzling to underground races, but they are not used to it.


    But just wear a pair of sunglasses to block the sunshine.


    Niu Ba shouted loudly, "The fortress on the surface is so grand!"


    "Haha... I, Lao Niu, had been a brick-moving company a long time ago. Commander Lu, or did you hire me to carry cement for you? I, Niu Ba, are the number one underground warrior."


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


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


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


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


    Running to the surface, where are there any resources...


    Lu Yuan said that he could understand: "Alas, our sky city is just to get resources... You actually already have it."


    "Come on, please come here. This is just an outpost, and the base camp in the rear is thousands of kilometers away."


    Humans have built small airports here.


    The aircraft is specially made, with no windows in the cabin and some special protective materials are used, so these underground people actually don’t know the specific direction of the human city.


    Its speed is much faster than the "Sky Fortress". It traveled 6,000 kilometers along the way, and in almost 10 hours, it reached the small Sky City.


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


    "Swish-" The hatch door opens.


    Compared with the majestic underground cracks, the City of Sky is like a small, exquisite stone, but it contains all people''s hope.


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


    The foundation of the new urban area has basically been completed and the area has been greatly expanded.


    The old city, new city, green mountains and coral island, together, these four areas can easily accommodate the living and living of a population of millions.


    Of course, the foundation is not necessarily completed and the details of decoration, water, electricity, greening, etc. will take a long time to expand the population.


    A large artificial glass greenhouse was established above the stump of the poppy tree - this is also what has been planned for a long time. This glass greenhouse can transmit sunlight and has certain defensive performance.


    In other words, the huge tree stump can no longer be seen from the outside world with the naked eye, and the safety of the poppy tree has been fully guaranteed. In addition, there is also an additional 2 square kilometers of military zone and external exchange area on the periphery.


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


    Accompanied by a gentle "jasmine" music, a large number of government officials have long been looking forward to it!


    There are also neatly arranged soldiers, hundreds of power armors, saluting them all.


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


    Lu Yuan was the first to get off the plane and breathed a deep breath.


    The scene in front of him made him feel a subtle touch. Giving time civilization and time life is the meaning of life, is it for this moment? What is the joy of returning home in glory?


    He saw the "Miss Maid" with tears in his eyes, the immortal giant tortoise with his head tilted, and the old cat hiding in the crowd.


    There is also the evil and crazy old wolf, with his tongue drooping and his tail shaking like an electric fan! This old guy full of legendary journeys is so intimate!


    And...the little mirage dragon!


    After not seeing each other for a year, the little mirage dragon grew up a little again, swallowing clouds and spitting mist, surrounding itself, as if it was a little shy.


    But the shiny eyes were as curious as ever - where did you, Lao Lu, have you gone there for so many days?


    And...numerous familiar people.


    In the quiet and turbulent mood, there is only one word to describe this kind of feeling - so down-to-earth!


    It seemed as if everything was put aside suddenly.


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


    "We 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!"


    "Shoot!"


    "Boom! Boom!"


    The salute roared!


    The applause of "crashing" was like a thunderstorm.


    After such a big reception ceremony, 48 representatives of 12 races from the Underground Alliance walked out of the plane with red faces.


    The red carpet was on her feet, and there were also human etiquette ladies who gave flowers around her.


    This sense of ritual is indeed done well - well, the Underground Alliance is a big funder of humanity, giving some face is not costing money!


    The bull-headed chief grinned and shouted, "Haha, you''re so kind."


    "Under the ground, we don''t dare to fire the fire, we''re so cowardly."


    "Oh, there is actually a turtle and a group of rats there, staring at us!"


    "There are really many races here! Accept us Taurus too, I can be yours..."


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


    "Sound!" Suddenly, high voltage electricity was generated on the bracelets of these cows, which made them numb all over and trembled and couldn''t speak.


    These are three rules that have been made in advance. If the Niutou clan wants to be a diplomat, he must bring an electric shock device to avoid nonsense!


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


    The other race representatives are much more reliable. When getting off the plane, they secretly observe everything here.


    “That’s…”


    "Can a city that is widely built outside the world... can it really be suspended?"


    The City of Sky is divided into three levels: upper, middle and lower, with hollow designs in the middle. This is for lighting. At a certain period of time all day, you can always burn the sun for a while.


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


    There are not many tall buildings, and they are only 40 meters high at most.


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


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


    I have to admit that the details are devils!


    For example, once a 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, and its lush vitality is so numerous that it is a little uncomfortable.


    And these details can only be improved in practice.


    If they also want to build a sky city, there are too many places worth learning.


    But how can we say this knowledge... humans will not take the initiative to sell it. After all, it involves civilized secrets and cannot be sold.


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


    (This chapter ends)