Chen Zheng and his team's search did not last long because one thing their search action was interrupted.

"Enemy attack!! The mining site of the copper mine canyon was attacked!" Dong Jie's anxious voice sounded from the channel.

"..." Chen Zheng was stunned for a moment and gritted his teeth slightly: "We'll be here soon!"

...

The copper mine mining site was the first red canyon full of copper crystals that Chen Zheng discovered.

Prisoners of war camps were initially established here, and the Imperial soldiers were responsible for collecting copper ores, and then they used the copper ores to exchange for food and various daily supplies with the supply convoys they drove past every day.

As an iron ore with a huge reserve was discovered, these prisoners of war moved. The advantage was that their quality of life became higher and higher since then, and the disadvantage was that they could no longer see the blue sky and the sun.

After the miners left, the mining of copper ore was handed over to more efficient collection robots. Of course, with the current technical level, these robots are mainly remotely controlled, and workers remotely control them to collect ore every day.

As the demand for metal copper gradually decreased, the active mining robots in the canyon also dropped from the initial 20 units to the average of 2. The ore they collected was piled in the simple camp where they were originally a prisoner of war camp.

Some defensive weapons were also arranged in the copper mine site, but its defense power was much worse than that of the mine. When the flying dragon attacked, the weak defense facilities were almost instantly cleaned!

When Chen Zheng flew over with five Viking drones, the building was empty... In addition to the scars all over the ground, only parts on the ground and green liquid spurted out by the flying dragon were making a "wavy" sound, emitting a faint green smoke.

"..." Chen Zheng flew back and forth several times, and after confirming that there were no other dangers on the ground, he directly landed the Viking fighter next to the mine site, brought a filter mask and summoned the lightsaber and walked towards the center of the battlefield.

"Be careful..."

"..." Chen Zheng seemed to have not heard the reminder in the headphones at all, and walked straight to the place where the entire mine site was most seriously damaged.

Bypassing the torn gun barrel and avoiding the armor that was corroded into colanders... Chen Zheng went to the core of the entire mine site, where the zero-electric conversion device was stored.

A large hole was torn through the metal plate that was originally buried deep in the ground, and the zero-electric conversion device that once hidden under it was no longer visible at this time, leaving only a huge pit left on the ground.

"..." Chen Zheng took a deep breath.

A place so far away from the base must be equipped with an independent power supply. However, with an independent power supply, those damn bugs can come to the door by smelling the smell!

"It's Zero Crystal, they are coming for Zero Crystal." The man with glasses suddenly inserted into the channel.

"Well, but not all." Chen Zheng bent down, picked up the twisted arm of a collection robot from the ground and looked at it, and threw it back to the ground.

“It’s learning, too.”

Chen Zheng murmured.

"Who is studying?" The man in glasses paused, as if he didn't hear Chen Zheng clearly.

"I mean, that female insect...it is learning our tactics." Chen Zheng continued, "There are only two collection robots that usually run, and the others are parked in the warehouse. However... those flying dragons found the warehouse and removed them, and killed all the collection robots."

"……this!?"

"how so!?"

The man in glasses and Dong Jie said in surprise almost at the same time.

"It is also learning to weaken our production capacity...it knows we need metal!" Chen Zheng drilled his fist and suddenly raised his head to look at the five Viking drones flying in the sky.

"Base, prepare 6 more cloud bombs... Xiaoxiao and Viking team returned to the base and hung up ammunition and set off immediately! Continue to investigate the vicinity of the equator, and destroy it directly once a new base is discovered!"

"yes."

"Wang!"

"Also...glasses." Chen Zheng took a deep breath.

"You order." The man in glasses bowed.

"The research at hand is stopped first... I think we need a new power facility." Chen Zheng had to pause the research on the Tide Gate and a series of important facilities again.

"..." The man in glasses did not interrupt and listened attentively.

"It is best to use firewood if you can generate thermal power... If you can't, use liquefied carbon." Chen Zheng thought about the principle of generators on earth, "If you don't understand, you can ask Uncle Xia directly."

"Yes." The man with glasses received the order.

There is no way to develop thermal power generation. After all, zero-electric conversion devices are too expensive, especially the zero crystals, which have extremely limited reserves in the base, and there are also a large number of other demand gaps in addition to energy.

If it is a one-time investment and permanent use - just like the ones arranged in a copper mine site before, Chen Zheng can still accept such consumption.

However, as humans compete for insects on the wilderness intensifies, it is common for various mineral sites to be attacked by sneak attacks... Chen Zheng did not have so many zero crystals to lose.

Thermal power generation is different, it is nothing more than metal materials and working hours... There are some on the metal planet, and although the working hours are a little tight, as long as there are people, it will not be a problem.

In a state of war, cost-effectiveness is always the most priority.

"In addition, we must strengthen the defense level on the other side of the mine..." Chen Zheng murmured to himself while standing among the ruins.

...

In the following time, the search team found several huge bacteria blankets again.

What is worrying is that in addition to the missile-like flying insects that have appeared before, more types of air defense weapons have appeared in the Zerg base again.

For example, a giant six-legged creature that can spew corrosive spores 15 times the speed of sound - it is named "Bun Tank".

Or a creature that looks like a giant snake with wings - they will spew out tiny cloud-like insects, corrode and gnaw on anything that enters their attack range. Even a strong Viking drone, if it is covered by the insect cloud, it will peel off even if it does not die - the true peel off!

The emergence of countless new units made Chen Zheng and his team less and less efficient in destroying the Zerg sub-base... However, with the expansion of the human base, from time to time, some mineral sites will be attacked by flying dragons that emerge from nowhere!

For a moment, the war on the Huangxing completely entered a tug-of-war mode.

Today I will destroy you two separate bases, tomorrow you will destroy my two mines, and flesh and steel will constantly collide and annihilate in repeated conflicts.

In such a war, the more insects fight, the stronger the fight, and the technology of the human side can be said to be developing rapidly...

However, the human side is increasingly feeling its own bottleneck - there are too few people!

There are too few mining workers! There are too few monitors! There are so few Viking pilots that cannot be fewer - the entire base has only selected 12 talented people flying Vikings! Letting others fly Vikings will only cause this expensive combat weapon to be lost continuously!
Chapter completed!