With the experience of the last flight to Mars and the optimization and upgrading of hope by its Decepticon engineer team.


    Although this solo trip was a little boring for sun Cheng, it took several days less than the previous flight to Mars.


    When controlling the spacecraft and landing at the Mars base in the middle of sailor Canyon, everything on the ground also shows that the Decepticons on Mars have been working hard in the past few months.


    "Squeak..."


    With the exhaust sound of the cockpit being opened, sun Cheng, who came out of the spacecraft, immediately saw the familiar bottom of sailor Canyon, which had quietly changed in the past few months.


    Hemispherical buildings like yurts spread all over his field of vision.


    Looking around, sun Cheng saw 17 yurts at a glance.


    On Mars, where severe weather is frequent and storms and sandstorms are frequent, this kind of protective building is essential if you want to carry out long-term operation on the surface of Mars.


    The Mars base is obviously equipped with some exploration equipment.


    When sun Cheng''s spaceship landed, he saw several Decepticons coming out of the nearest yurt building, staring at the sand and coming towards him.


    "Master, welcome to the Mars base!"


    When sun Cheng landed, the Martian weather was not good. A medium-sized dust storm had blown, resulting in a lot of wind and sand in the nearby canyon. The sky seemed to be dyed red.


    He waved his hand and directly motioned several Decepticons to enter the nearest yurt building nearby. Then he shook his body and shook off the sand and dust around the body. Then he asked, "you''ve done well in recent months. I see a lot of buildings in the Canyon!"


    Mars in the solar system, strictly speaking, is not a resource rich planet.


    But that is also relatively speaking. After all, the size of the planet is here. Even if the resources are not as good as the earth, it is also a planet, which must be richer than a continent in South America.


    And unlike South America, which has a total population of nearly 400 million, there is no life on Mars except Decepticons, and Decepticons don''t have to worry about exposure.


    Entering the building, sun Cheng subconsciously looked into the building.


    This seemingly insignificant yurt building, completely according to the original design of Decepticon engineers, has begun to contribute to the development of the Mars base.


    The ground space of yurt building is not very large. It mainly leaves a certain operation space for Decepticons and robots.


    There are two underground entrances in the building, one leading to the underground mining site and the other connecting the Mars base.


    From time to time, transport robots full of ore can be seen climbing out of the mining site and driving to the Mars base through another channel.


    This is the most reliable operation method on Mars. After all, the bad weather and environment here still cause great loss to the robot.


    Sun Cheng turned to the underground mining site. Although he came here this time mainly to supplement the strength of the Mars base, in addition, he also needs to take an examination of the development here in the past few months.


    After all, Mars is too far from the earth. For the sake of concealment and security, sun Cheng can''t come too often before taking off the Decepticon''s lunar base.


    In order to prevent these Decepticons from fooling themselves, sun Cheng deliberately chose to land near a building a little farther from the base.


    Follow the passage into the underground mining site. The layout here is almost no different from that of human mines on earth.


    It''s just that the ore channel is wider, and there are no humans or vehicles transporting ore, but mining robots and transportation robots.


    Because the first batch of Decepticon engineers sent to Mars are rare, it is impossible to arrange an engineer to be responsible for a mining property, and we can only use the way of round-trip inspection to avoid mistakes.


    Although this is troublesome, it is also the most suitable choice for Mars base.


    All the way to the depths of the underground mining site, until he had reached the position where he couldn''t move forward, sun Cheng didn''t stop.


    He asked as he walked, and several Decepticon engineers and engineers were constantly answering his questions.


    "Over the past three months, we have established 31 underground mining sites on Mars... At present, all these mining sites have established connection channels with the transit center..."


    More than 30 underground mining sites are far and near from the Mars base. If all underground passages leading to the base are established, it will undoubtedly be a huge project.


    So, Decepticon engineers and engineers took a trick.


    They selected several suitable places near the base and built several transit centers. The distance from the transit center to the nearby underground mining site is almost the same, but they only need to build an underground transportation channel from the transit center to directly connect to the Mars base.


    With this method, Decepticon engineers and engineers saved a lot of work, manpower and material resources.


    Sun Cheng nodded without provocation. He still recognized this ingenious method.


    After inspecting three underground mining sites in a row, he went to the nearest transit center. Only then did he rush to the Mars base with satisfaction.


    More than four months have passed since Sun Cheng''s first arrival on Mars. The Decepticons engineers and engineers responsible for the construction of the Mars base, commanding thousands of robots of all sizes, have built the foundation of the Mars base from scratch.


    However, there are many problems. The most serious one is the lack of coal.


    "... lack of coal is a big problem. So far, we have taken the base as the center and explored 421 kilometers away, but we still haven''t been able to explore a coal mine in this area..."


    Coal is an essential raw material for industry. It is not only an important fossil fuel, but also an essential part in many industrial fields such as chemical industry and smelting.


    According to the hypothesis put forward by human scientists on earth, coal is a special resource formed by the long-term geological evolution of the remains of animals and plants buried underground.


    Although scientists on earth have always believed that Mars gave birth to life and civilization before ancient times.


    But at least by the time sun Cheng arrived on Mars for the second time, his Decepticon engineers had not found coal on Mars.


    In addition, there are many problems here.


    Among them, one discovery made sun Cheng frown most.


    "Master, we may not be the first batch of visitors to Mars. Pathfinders visited here a long time ago. Our exploration team found an insignificant mountain wall in a remote Canyon about 300 kilometers away from here. On the mountain wall there, we found some old words that could not be interpreted!"