With the experience of the last flight to Mars, coupled with his team of Decepticon engineers, the Hope has been optimized and upgraded.

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

When the ship landed at the Martian base in the middle of Mariner Canyon, everything on the ground also showed that the Decepticons on Mars had been hard at work for the past few months.

"Squeak......

With the sound of the cockpit being opened, Sun Cheng, who stepped out of the spaceship, immediately saw the familiar bottom of Mariner's Canyon, which had quietly changed in the past few months.

Hemispherical buildings like yurts spread across his field of vision.

As far as the eye could see, Sun Cheng saw seventeen yurts at a glance.

On a planet like Mars, where severe weather is frequent, and there are many storms and sandstorms, such protective structures are indispensable if you want to carry out long-term operations on the surface of Mars.

On the Martian side, it is clear that some exploration equipment has been equipped.

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

"Master, welcome to the Martian base!"

The weather on Mars when Sun Cheng landed was not good, and a medium-sized sandstorm had already blown up, causing a lot of wind and sand in the nearby canyon, and the sky seemed to be dyed red.

He waved his hand and directly motioned for a few Decepticons to enter the nearest yurt building nearby, and then shook his body and shook off the sand and dust everywhere before asking: "You guys have done a good job in the past few months, I see a lot of buildings in the canyon!" ”

Mars is in the solar system and is not technically a resource-rich planet.

But that's also relative, 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, and it 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 for them, and the Decepticons do not need to worry about exposure.

Entering the building, Sun Cheng subconsciously looked carefully into the building.

This unremarkable yurt-style building, designed exactly by the original Decepticon engineers, has already begun to contribute to the development of the Mars base.

The yurt-style building floor space is not very large, and it mainly leaves a certain amount of room for the Decepticons and robots to operate.

There are two underground entrances to the building, one leading to an underground mining site and one to the Martian base.

From time to time, you can see a transport robot full of ore, crawling out of the mining site and rushing to the Martian base through another passage.

This is the safest way to operate on Mars, after all, the bad weather and environment here still have a lot of wear and tear on the robot.

Sun Cheng went to the underground mining field, although he came here this time, although it was mainly to supplement the strength of the Mars base, in addition, he also needed to test the development of the past few months.

After all, Mars is too far away from the earth, and for the sake of concealment and safety, Sun Cheng can't come too often before the Decepticons' lunar base is terminated.

In order to prevent his Decepticons from fooling him, Sun Cheng deliberately chose to land near a building a little further away from the base.

Follow the passage into the underground mining site, which is laid out almost not much different from the human mines on Earth.

It is nothing more than that the mine road is wider, and there are no humans and vehicles transporting ore to and fro, but mining robots and transportation robots.

Because the number of Decepticon sappers sent to Mars in the first batch is scarce, it is impossible to assign a sapper to be in charge of a mining mine, so they can only use the method of patrolling back and forth to avoid mistakes.

Although this is a bit troublesome, it is also the most suitable choice for the Martian base before.

He went all the way to the depths of the underground mining field, and did not stop until he reached a position where he could not move forward.

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

"In the last three months, we have built 31 underground mining sites on Mars...... At present, all these mines have established a connection to the transit center......"

There are more than 30 underground mining sites far and near the Martian base, and it would be a huge project to build underground passages directly to the base if all of them were built.

So, the Decepticon engineers and the sappers took a trick.

They chose a few suitable places near the base to build a few transit centers, from which the distance from the transit center to the nearby underground mining site is about 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, the Decepticon engineers and sappers saved a lot of work, manpower, and material resources.

Sun Cheng nodded without picking on the thorns, and still recognized this tricky method very much.

After inspecting three underground mining sites in a row, and then going to the nearest transit center to have a look, he rushed to the Martian base satisfied.

It has been more than four months since Sun Cheng and his first arrival on Mars, and the Decepticon engineers and sappers who are responsible for the construction of the Mars base, commanding thousands of robots of various types, have built the foundation of the Mars base from scratch here.

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

“…… The lack of coal is a big problem, and we have so far explored as far as 421 kilometers away from the base, but we still haven't been able to detect a single coal mine in this area......"

Coal is an indispensable raw material for industry, it is not only an important fossil fuel, but also an indispensable part of 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 remains of animals and plants buried in the ground after a long period of geological evolution.

Although scientists on Earth have always believed that Mars once arose to give birth to life and civilization.

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

In addition, there are quite a few problems here.

Among them, there was one discovery that made Sun Cheng frown the most.

"Master, we may not be the first to set foot on Mars, which has been visited by pathfinders for a long time. Our exploration team found an inconspicuous mountain wall in a remote canyon about 300 kilometers away. On the mountain walls there, we found some indecipherable patriarchal texts! ”