After the convergence, Chen Mulin asked with concern: "Tiezhu, how are you?"

Tie Zhu shook his head: "It's okay!"

"Hehe, too, the barrier hasn't been broken. Chen Mulin also shook his head, feeling that he was too worried.

Originally, he wanted to care about it, but seeing that Tiezhu was silent again, Chen Mulin had to change his tone and comfort: "Don't worry too much, your mother should be fine." ”

"I know. Tie Zhu said he understood, but he was still very worried: "But before I saw my mother, I really couldn't let go." ”

Chen Mulin thought for a while and said, "That's it, go back and bury your younger brothers and sisters first, and then I'll give you a plan to look for." ”

"Good!" Tiezhu nodded in response.

There is no way to do this, since the ground can't be found, the only place where Mother Iron Pillar can hide is underground, or she is dead.

This is also a possibility, after all, she was already seriously injured at the time, and even if she was able to escape from the plasma swarm, it would be difficult to survive without supplies.

Of course, without complete certainty, it is impossible for Tie Zhu to allow the search to stop, even if Chen Mulin does not look for it, he will look for it himself.

In this case, it is better to go with two people, not only is it safer, but the efficiency of the search will be doubled.

Similarly, Chen Mulin is also going to explore Mars, which is also a good opportunity.

It is also a coincidence that that area happens to be the area where one of the drones lost its signal, and Chen Mulin is preparing to find some time to explore it.

It's good now, it's okay to find someone to explore, and there is a cheap son to accompany you, and the process will not be too boring.

Back at the base, Chen Mulin and Tie Zhu cremated the six corpses in the way of the earth, and then found a place to build a small cemetery and buried them.

After that, Chen Mulin told Tie Zhu about his plan, and he didn't hide it, and told him about the drone before.

Naturally, Tie Zhu was very happy, although he had amnesia and couldn't remember the location of the clan, but at least there was a hope now that he could find the location of the clan together while looking for his mother.

Because there is no map of the underground passage in that area, and the drones on the ground have been shot down by plasma bugs, it is not known where the entrance is.

Judging from the current record, not to mention how powerful the current equipment is, self-protection is completely okay, so there is no problem with the equipment.

The problem now is that it takes time to find the entrance.

There are plasma bugs in that area, and the number of drones is small, so you may not be able to find the entrance after being shot down.

In order to ensure the smooth progress of the plan, Chen Mulin spent half a day to build drones, and only stopped after building a sufficient number of drones.

Next, all the drones are sent out and supported by numbers until the location of the entrance is discovered.

The next day.

At this moment, Chen Mulin and Tie Zhu had bypassed the position of the plasma worm, successfully entered the passage, and were groping underground.

Before moving on, Chen Mulin explained the precautions to Tie Zhu in advance.

"Iron Pillar, you listen well. ”

"Be sure to follow me, don't trespass, it's not clear what danger there is inside, the terrain here is narrow, unlike the ground where you can fly into the air, once you encounter danger, it is difficult to escape, so keep an eye on the radar, always pay attention to the dynamics of the beasts." ”

"Understood, I'll follow you!"

Since it was the first time he had entered the underground passage after his amnesia, Tie Zhu was very curious about everything here, and from the time he entered to the present, he had been looking around, and he could see the heat in his eyes.

Chen Mulin didn't say much when he saw this, after all, he had also experienced it, and he began to move forward after finding the right direction.

The passage here is no different, it is the same as the previous one, it is all excavated by strange beasts.

Perhaps the different places are the traces of excavation, some of the beasts may be planed, some by gnawing, and some by secretion corrosion.

And the passage here looks more rounded, which should be corroded.

Because the drones underground here have lost contact, they have not detected the channel, and within a kilometer, they can still rely on the map scanned by the drones on the ground to move forward, and when they are a thousand meters down, they can only grope forward on their own.

Because the passage here does not have an energy crystal relay signal, they can't contact the base, they can't contact the base, and they can't draw a map through the base's computing power.

Therefore, for Chen Mulin, this is an unknown area.

Even if the radiation area of the radar reaches one kilometer, it can only search for creatures within one kilometer, and to draw a map, with the computing power of the battle armor, it can only draw an area with a diameter of about 100 meters at most.

What Chen Mulin had to do now was to hurry to the place where the depth was about five thousand meters, and the walls were covered with energy crystals.

Obviously, it was impossible for them to find this position, after all, it was a completely dead field at this depth.

Not only is it full of danger, there is no oxygen here, and Iron Pillar and his mother obviously will not stay in this place to recuperate.

Only when you go to a range of about five kilometers can there be enough oxygen, and there is a chance to find food and a place to rest.

As Chen Mulin thought, this area is likely to be inhabited by Martians.

If there were Martians living here, then it was impossible for Iron Pillar's mother not to know, and if she knew, she would have rushed somewhere.

In the same way, it is impossible for Martians to live at a depth of more than 1,000 meters without oxygen and the environment is still very poor.

Based on what has been detected by radar so far, this is clearly the territory of plasma bugs.

Chen Mulin thought of a possibility.

Could it be because Tiezhu's mother took them to visit relatives or other things, because there was no direct road to here, so they had to venture to the surface and sleep all the way to the top of here.

Knowing that this is the territory of plasma bugs, they need to find a relatively safe time to enter.

But an accident appeared, the Martian beasts rioted, and the plasma worms here also came out of the passage, thus discovering them, and before they could enter the underground space, they were attacked by the plasma worms, and then there was the current situation.