"Go away!" Chen Zheng turned around and patted the driver of Explorer 3, and ordered loudly:

"Run away while those things have not come yet!"

"yes!"

The driver also saw the replay just now, so he didn't dare to neglect it. He twisted the rod and shifted backwards. Then he saw Explorer No. 3 turn around lightly and run wildly in the direction he came.

On the picture, the light of the searchlight illuminates a small area in front. It’s like a low beam turning on in a dark tunnel, and the whole world seems to be left with the self in the cab and the small brightness in front.

The bumpy ground was bumpy, and from time to time, insect shells that seemed to have grimaces floated by the ground...

"Wait...what sound!?" Chen Zheng suddenly said.

"What sound?" The man and the glasses were originally observing the scene nervously around Explorer No. 3. Hearing Chen Zheng said this, he was so proud that he didn't dare to let out. He held his breath and listened with his ears...

“Buzz buzz…”

"It seems like the sound of insects flying!?" The man in glasses frowned and stopped for a long time, and suddenly his expression changed drastically, "Not good! Look behind!"'

The Explorer 3's camera suddenly twisted behind him, and the searchlight's focal length was turned to the farthest mode... However, even so, it still couldn't penetrate the darkness behind him.

“…”

“Buzz buzz…”

The sound is getting closer and closer!

Suddenly! Some pale dots seemed to flash in the picture...

At this time, the camera and searchlight turned to the rear, and the driver could only follow the 3D map drawn before, but there was no wreckage of Explorer 1 on the map...

"bump!"

"I bumped into something!"

The operator next to him quickly turned the camera back and saw that Explorer One had been corroded so that it could not tell the original appearance, and the green liquid on its body seemed to have become sticky!?

"Turn back! The ion wind power is turned on to the maximum and blow it behind you!" Chen Zheng ordered decisively.

"yes!"

The operator was stunned for a moment before answering.

It's not his fault. The tense atmosphere made him forget that he was just a robot that could be abandoned when he was young... Compared to exploring the wreckage of No. 1, this steel body is really nothing.

Fortunately, I don’t know whether it was the ion wind that made the vicious little things retreat, or because the temperature near the entrance of the cave was getting lower and lower... In short, they succeeded.

Explorer No. 3 dragged the remaining body of No. 1 and slowly moved forward in the tunnel... The tension in the entire tent finally dissipated.

"If...I mean if it's spring... will these little bugs fly out of the cave?" Chen Zheng asked.

"...definitely..." The man with glasses also looked heavy.

"..." Chen Zheng remained silent.

He did not continue to ask "Does these insects eat human flesh?" because he knew the answer was yes. Otherwise, those long-handed and legs on the mural would not have become extinct.

"But we are facing more than just difficulties - from the murals, the zero crystals on this planet seem to be very abundant." The man in glasses suddenly put forward another perspective.

"If those people were destroyed by Zero, then those Zero Crystals must still be there. Zero Crystals are used to hoarding Zero Crystals..."

"In other words..." Chen Zheng's eyes suddenly lit up, "As long as we break through here, we can get a large amount of zero crystals!?"

"It's true in general." The man in glasses didn't say anything to death.

Chen Zheng pondered.

Uncle Xia’s research is coming to an end... However, even if you understand the principles, it does not mean that Chen Zheng and his team can create it at their current level.

The tidal gate involves many strange elements, some unique structures that are difficult to process and some parts must be made of pure zero crystals.

It can be said that each tide gate is built of countless zero crystals, and the little zero crystal hidden in Chen Zheng’s tree hole is not enough!

"At least threat and hope have become the same problem..." Chen Zheng rubbed his temples and suddenly felt a headache.

I remember that tunnel combat is usually sealed by flamethrowers, and the entrance collapses. If you occasionally need to "deep cleaning", please call the ground-boring bomb or cloud-explosive bomb.

However, even with such a cleanup, the US military during World War II still paid an extremely painful price. It was not until the Japanese defending the bunker were surrendered by the "fat man" and "little boy" that the bunker problem was completely solved.

However, this could not bring any idea to Chen Zheng to solve the problem - he had neither the "Big Ivan" nor the target of throwing firecrackers, and the underground bugs would not surrender because of the threat.

Just as Chen Zheng was thinking about this issue, Explorer No. 3 came back.

When several people wearing protective suits and fully enclosed helmets saw the tragic situation of Explorer One with their own eyes, everyone became silent.

At this time, the metal on Explorer One's body was already crispy, and it was falling down with the vibration. The originally solid support structure now seemed to be puffed food filled with tiny bubbles. If it was slight bump, the whole piece would break.

At this time, the green liquid had become very viscous, and its color had also changed from light green to dark green.

"...This needs to be sampled and analyzed... Be careful, this thing can corrode the glass..."

The man in glasses carefully tried with sticks of different materials. After finding that the green liquid could not corrode the resin, he handed a resin bottle to his assistant.

After that, the sampling and testing were not mentioned, and those things were not helpful to Chen Zheng.

He was thinking about how to completely eliminate all kinds of threats in the cave. Although under the current temperature conditions, the various creatures in the cave seem to be very uncomfortable, so even humans who are parasitized by zero can't be exposed to such temperatures for a long time.

However, people always have to think about it for a long time.

Winter will not always exist. Although Chen Zheng has no weather information about the wild stars, judging from observations during this period, the lowest temperature every night has become higher and higher...

Spring seems to be not far away...

...

“…sturder armor, corrosion resistance, flamethrower fuel, stronger power and detection equipment…is there anything else to add?”

The male glasses Chen Zheng’s idea of ​​the new generation of “cleaner” robots was recorded in a small notebook.

"We also need to have robotic arms, and we need to perform sampling and analysis of every type of insect." Chen Zheng thought for a while and added.

"…mechanical…arm…” The man with glasses recorded the last item on the record.

"Tell me, what's the problem."

"Corrective resistance can be solved with resin coating, and flamethrower fuel can be made of water and gas, power and detection equipment are not a problem... but we have no choice but to use strong armor."

The man in glasses closed the pen and said, "The only metal materials we can provide now are copper, and most super-hard alloys require iron and titanium. It's okay to say that iron ore can be refined in large quantities... But we don't have a good way to refine titanium elements yet."
Chapter completed!