The engineering mecha in front of him was corroded and disintegrated at a speed visible to the naked eye, turning into brownish-black slag.

With a thud, a small Germanium miner fell from the belly of the front mech and landed on the floor of the tunnel. The surface of his body had corroded and peeled off, and he screamed in horror loudly in Germanium: "What's the matter?!" What did we encounter? ”

Behind him, several more sounds, several miners fell out of the disintegrating mecha and struggled in the passage.

"Pure oxygen? Why is there pure oxygen? ”

"No, it's not oxygen, it seems to be a cloud!"

"Huh? Have you ever seen it? ”

"How can there be a mist in the pit, there can't be a mist on this planet!"

"Ah, my torso! We're going to die, my torso ......"

In a few tens of seconds, a team of engineering mechs and the germanium miners inside were all turned into residues.

"This element is so strong!" Pei Jingdong was surprised. "Can it really corrode all metal?"

Previously, she had only heard that Qin Guan had obtained an unknown powerful element, and today she had only seen the power of this element for the first time.

Qin Guan: "Yes, and it doesn't react with other substances." ”

"That's really a precision strike, killing the metal man invisibly." Pei Jingdong continued to sigh.

Qin Guan smiled, but secretly frowned: "These miners will shout before they die, for fear that they will leak the news!" Can't let them notify their kind! ”

Pei Jingdong: "Leave the matter of sealing to me, and then I will seal my throat with sword qi in time!" ”

"Youlao senior!"

The three of them pressed against the cave wall, bypassing the pile of metal residue and continuing on their way.

……

At the same time, at the other end of the pit.

Xue Weiyi's three-person team also encountered the germanium miner mecha.

The Tibetan bow struck quickly, and the long-handled axe changed into a bow form, and the transparent arrow clusters made of transparent diamond were shot at the low miners who fell from the engineering mech;

The miners had barely let out a brief struggle before a cluster of arrows pierced their heads.

Later, it was corroded by the gas and turned into residue.

Dongmen Youfu hurriedly said beside him: "Sister Zanggong, your hand is too fast, I haven't even taken out my sword...... Leave me two. ”

Hidden bow: "You are a melee man, what are you fighting with me?" Xiao Xue hasn't spoken yet. ”

Xue Weiyi said with a smile: "In terms of combat awareness, the master is 0/a second faster than me, and with the master here, I won't grab the merits." ”

The Tibetan bow accepted the Yue Yin Bow, but suddenly reacted: "I was too anxious to shoot just now, I shouldn't use diamond arrow clusters, I should use Yuanli arrow qi~." ”

Dongmen Youfu: "Why? ”

"Qin Guan said that we can't leave evidence for this operation, if this arrow cluster stays here, it will become a handle." Zang Gong smiled to himself: "Alas, the diamond arrow cluster has been used too easily recently, and there is no shortage of materials on the Great Wilderness Star, so ......"

Xue Weiyi: "Little thing, Master, I'll go pick up those arrow clusters." ”

Hidden Bow: "Don't leave footprints on the residue!" ”

"Understood!"

As he spoke, Xue Weiyi had already jumped up lightly, several of them jumped sideways in the air, and each time he jumped accurately above a sword cluster, and when his body was in the air, the ape's arm was lightly relaxed, and he reached out and clamped it with two fingers, and the arrow cluster embedded in the metal residue was firmly clamped out.

Treading snow without leaving a trace.

In the blink of an eye, he returned to the Tibetan bow, spread out his palms, and ten transparent arrow clusters were floating in the air on the invisible gloves: "Master, ten are you right?" ”

Tibetan Bow: "Yes, there are quite a few of them. ”

The three of them also bypassed the pile of debris and continued on their way.

……

The three of them walked along the passage in Qinguan, walked deeper into the mining operation area, and walked for a while, and not far in front, they heard the voice of the germanium miners.

"Did you just hear anything? There seems to be movement on the other side of the well? ”

"I heard that, too."

"But it's safe and sturdy over there, so it won't collapse, right?"

"Shall we go over and have a look?"

"It's not our job to go, let's inform the patrol team."

"If you don't go to see it, you will notify the inspection, in case it's okay, is it considered to be lying about the news?"

……

Several miners were in the engineering mech, lazily discussing.

The movement in the distance did not arouse their sufficient vigilance and alertness.

The three of Qin Guan had already silently surrounded these engineering mechas, and the colorless and tasteless aura quickly enveloped them.

Rumble! One of the mechs was the first to collapse on its two hind legs, falling backwards on its back.

"What~~ what's going on!"

With a bang, the miners inside were thrown out, and before they could shout a second time, they saw a blue and white cold light flashing diagonally, and a sword qi from Pei Jingdong had already split the miner in half.

Immediately afterward, several other engineering mechs also shredded and disintegrated.

One by one, the dwarf germanium miners fell out of the mecha, and in a few seconds, several miners were cut into metal stumps, and then they were corroded by the gas at a visible speed, like the residue left behind after a plant had been fully burned in oxygen.

Qin Guan raised his eyes and glanced at it to make sure that nothing was missed, and the three of them continued to move forward.

After walking a few hundred meters, the end of the passage suddenly opened up, and there was a spacious and tall cave hall dug out by machinery, with many heavy engineering mecha with different forms and division of labor, which were busy in an orderly manner.

Transporting ores, crushing, refining metallic elements, pressing and transporting residual rock slag...... The loud noise shook Qin Guan's ears numb.

Around the wide cave, there are more than a dozen passages, leading to different directions, from which ore is continuously transported, and the residue is continuously transported away and backfilled in the formation.

Wherever they mine, the germanium miners extract only useful elements, and at the same time backfill and tamp the mined strata because they don't want to bury themselves deep underground on another planet.

But even so, the entire planet is devastated.

Amid the deafening noise, Qin Guan said: "The germanium miners in this area are basically all concentrated here. ”

"Well, according to what we explored before, this litter is basically very concentrated." Chen Tofei took out another bottle of liquid and stuffed it into his glove: "A pot served them!" ”

Qin Guan thought about it: "Wait, don't worry, there are many germanium clans here, spraying one bottle at a time is not the way, if there are some pour first, some pour later, those who die slowly will definitely exclaim, they must be destroyed at the same time, it can be regarded as a real pot."

"It's a bit of a mistake this time, I should get a big liquid bomb next time......"

Speaking of bombs, Qin Guan looked around and immediately had an idea.

The three of them swooped separately, and buried hundreds of liquid tanks in more than a dozen passages and in the caverns where the metal was refined, and buried remotely controlled bombs in them.

At the same time, he used the quantum communicator to inform Xue Weiyi and asked them to do the same.

After more than ten minutes, the liquid tank and bomb were planted, and the three of them retreated to the passage leading to the lifting shaft.

Qin Guan pressed the bomb detonation switch.

Boom Boom!

Several bombs in the mining area were detonated at the same time, melting the high-pressure liquid tank made of plastic in an instant, and the liquid in the hundreds of liquid tanks vaporized in the high temperature of the explosion and quickly dispersed!

The hundreds of germanium miners in the cave hall didn't know what was going on, and they had been swept away and corroded by the extremely high concentration of gas!

Before many germanium miners could make any sound, in the high concentration of gas, when they fell out of the engineering mecha, their bodies were still basically intact, and when they fell to the ground, they had been thoroughly corroded and broken into fragmented pieces, and then they were crushed by the crumbling mecha above, mixed into a pile of black-brown residue.

……

Outside, inside the passage, Chen Tofei whispered: "I think of a small question, will the plastic bottle leave fragments?" ”

Qin Guan: "No. Theoretically, high-purity plastics are capable of sufficient combustion;

"If it is not fully burned, it will produce a large amount of toxic gas that is harmful to humans, and finally leave black carbide behind;

"But the batch of high-pressure canisters used by the Interstellar Element Research Institute is of good quality, the plastic material is very pure, it is not an ordinary civilian product, and there will be no residue left."

The morning throw flew away.

A few minutes later, there was silence in the cave hall where the metal was refined.

The plundered land became the burial place of the Germanium miners.

News also came from Xue Weiyi's side soon, and it was also done!

Qin Guan breathed a sigh of relief and said to Pei Jingdong: "Senior Pei, you fly straight up from the main passage, intercept the Germanium Duo clan at the entrance of the pit, and meet the Sikong seniors and prepare to lead magma; I took the four of them and teleported directly to the Bujinai base! ”

Pei Jingdong: "Okay! ”