Roaming the universe, all thanks to your many dark skills!

When Mark slowly spread out the very detailed contour map in front of Rosen, he immediately received a system prompt.

"You have discovered and loaded a new style of map, experience points +200."

"The map expertise level has been raised to LV5. Any map will guide you and can be converted into a contour map according to your needs. The accuracy of the map generated by your visual measurement of the terrain is +20%. When you use the delivery, the error value is even smaller."

For Rosen, this was definitely a pleasant surprise.

This also proves from one aspect that the topographic map that Mark took out was quite complicated and might even be top secret.

"It's time to think long-term." Mark pointed to the mark he drew on the topographic map and said seriously, "Rosen, to be honest, I hesitated for a long time before coming here. In the end, I still felt that I should come here to invite you to come with me, so I also hope that you can live up to my trust."

"Okay." Rosen nodded.

Mark said: "NASA's next mission is Ares 4, which should land in the Schiaparelli crater, which is 3200 kilometers away from here."

"3,200 kilometers." Mark looked at Rosen and repeated the number, saying, "Four years later, when the Ares team arrives, we must be there. Only then will we have a chance to return to Earth."

"In other words, we must reach the crater before then."

"Then here comes the problem. I have a usable Mars rover with a maximum range of 24 kilometers. The battery must be charged in the living cabin before use. This is the first problem."

Mark rubbed his face with his hands and said, "Question two, it will take us about 50 days to complete this trip, so we need to have at least 50 days of supplies to sustain our lives."

"There's a tiny life support unit in the rover, about the size of a minivan. In this dire situation, the only option left for me is to do some research to fix this shit."

At this point, he looked at Rosen expectantly, and solemnly extended his hand, saying, "So, I need your help. It is very important to both you and me."

Rosen really wanted to tell Mark that there was no need to go through so much trouble.

As long as he stays here honestly and waits for his teleportation or delivery level to be raised, a mere 3200 kilometers is nothing and he can reach the destination easily.

But looking at Mark's sincere face and his hopeful eyes, Rosen finally decided that it would be better not to tell him about this for the time being, so as not to dampen his morale.

Otherwise, if he has no goals to strive for, how will he get through the long time ahead?

So Rosen followed Mark to find the damaged Mars rover that had overturned, removed all the useful things from it, and installed them on the intact Mars rover No. 2.

Then the long-distance travel test began.

Although Rosen strongly suggested that he could drive the rover, Mark never agreed in order to avoid any mistakes that might damage the rover.

This made Rosen very disappointed.

Solar Day 74.

When night falls on Mars, the temperature of the surface drops sharply.

You can imagine how cold it was inside the car without the heater on. The breath Mark exhaled froze into white frost.

However, because Rosen had the Ring of Spring, he was fine. He leaned against the car window and admired the night view outside.

To be honest, although it is both a starry sky, it is different when viewed from Earth and from Mars.

Mark stopped the train, looked at the instrument on his arm, and began to record a log while shivering with cold: "The good news is that I succeeded. By looting car No. 1, I doubled the power."

"But the bad news is that if I turn on the heater, I'll use up half of my electricity every day, but if I don't use the heater, I'll..."

He smiled and said humorously, "It's being slowly killed by the laws of thermodynamics. I'd like to solve the problem right now, but my balls are about to be frozen. No, so let's just leave it at that."

As he said that, he turned on the heater, then looked at Rosen who looked calm and said, "Rosen, why don't you seem to be cold at all?"

"Who said that?" Rosen denied it immediately, and then explained: "I'm just not obviously cold."

"Fuck." Mark suddenly cursed in Mandarin, and then added: "I want to eat Sichuan hot pot when I get home. The spicier the better."

"no problem."

As they have been spending more time together lately, Rosen has started trying to teach Mark Mandarin, with swearing being the first step, and it seems he is learning it quite well.

"I have a way to solve the heating problem." Mark said while driving, "The bad news is that I have to dig out the radioisotope thermoelectric generator."

"If I remember correctly, one of the lessons during training was called Don't dig out that big plutonium box."

"You know, plutonium has always been one of the energy sources for space exploration. Since solar panels have many disadvantages and limitations, such as being easily damaged, requiring sunlight, and having to be kept clean, NASA often uses plutonium as an energy source."

Mark began to teach again, "But it's not used for nuclear fission, but for the heat it emits. The surface of this thing can cook eggs, and it must be warm enough in the car, provided it doesn't break, otherwise we'll both be doomed."

"Let me correct you. You're the one who's finished. I don't want to stay in the car with you," Rosen said.

"Rosen, we are good friends who have shared weal and woe. Why are you so cold and heartless?" Mark lobbied, "Don't worry, the radiation is not fatal. As long as we don't break it, as the people in the Engineering Logistics Department say: nothing will happen."

In the end, Rosen was persuaded by Mark.

After eating hot pot, the two went to dig up the big plutonium box.

Solar Day 76.

After getting on the road again, the car did become warmer, and Mark felt more comfortable. His mental state was different from before, and he became excited and talkative.

"To be honest, it is indeed a lot warmer. I am no longer cold. Of course, you can also understand that there is a radioactive isotope behind me that is constantly decaying, but these are not a problem."

Mark looked at the camera recording the log and said, "Another good news is that I don't have to use Commander Louis' discs anymore. I have better songs provided by my Chinese friend Rosen."

As he said that, he turned on the car's player.

"You are like a fish in my lotus pond..."

Mark listened with his head nodding, praising repeatedly, "It sounds good." Occasionally he even sang along.

But Rosen leaned his head against the cold car window, wanting to hold the big plutonium box and die with him.

Oh my God, what sin have I committed? Why am I on Mars, listening to "Moonlight over the Lotus Pond" with a rough old man who smells like sweat.

on the earth.

Vincent, who had just finished a press conference, was completely deprived of the right to face reporters by Director Teddy.

Then he hurriedly summoned his men and asked them to speed up the manufacture of equipment so that the advance supplies could be transported to Mars as soon as possible.