After completing all this, Ye Bing couldn't wait to run back to the base, raised his head and shouted:

"Natasha, hurry up and convert the energy in the recovery tower to the base!"

"All?" Natasha asked.

"That's right!"

"Okay, run it for you right now."

Ye Bing cast his expectant gaze on the material recovery tower outside the base, and could see that under the control of the main base, it was carrying out the second treatment of the liquid in the container. A series of biochemical reactions that Ye Bing couldn't understand at all quickly occurred inside, accompanied by bursts of roars. The metal balls at the top of the tower finally began to react, and they all emitted a white glow, and there were faint arcs of electricity between them from time to time!

After approximately ten minutes, the tower ceased again, the original black and green mixture was consumed, and the cylinder container returned to its empty state.

"Natasha, hurry up and switch back to the main base attribute screen!"

With Ye Bing's order, the attribute screen of the main base jumped back to the big screen again.

Ye Bing stared at the screen blankly for a while, and suddenly burst out with a loud roar:

"I'll go, eight points of energy!"

He suddenly wanted to dance like a child, and laughed as he danced:

"Wowha, I'm just a genius! In less than three days, eight points of energy were obtained, which not only directly earned back the principal of the material recovery tower, but also nearly doubled the surplus! ”

Just when Ye Bing was immersed in the joy of harvest, Natasha's faint voice suddenly came:

"Congratulations."

was a simple three words, but Ye Bing was taken aback!

"Natasha, you, would you still say such compliments?" Ye Bing stumbled and asked.

"According to the analysis of the brain, taking real-time praise to the commander will help the overall development progress of the base." Natasha replied unhurriedly.

Ye Bing sighed rather speechlessly, thinking to himself that you are still a wise brain, don't you know that once you tell the other party that you just want to compliment him, then the other party's joy will be completely dissipated at once?

Alas, forget it, there is no need to be like the brain......

Ye Bing sat back in his chair and began to think about how to use the eight precious energy points he had just harvested.

Since you have mentioned this issue, you should first think carefully about what your main needs are at this stage.

Well, the first thing that needs to be guaranteed is definitely your own safety. However, at this stage, at least when he is obediently hiding in the base, this problem should not be a problem, after all, with the dual protection of electromagnetic shielding and beam towers, a small-scale primary zombie still can't do him any harm.

Thinking of this, Ye Bing frowned, and couldn't help but worry about another problem.

What if there is a surprise attack by the armed forces with heavy fire?

The thought took a turn in his mind and was quickly dispelled, just because the likelihood of this fear being too small was to happen. Under the protection of electromagnetic shielding, the radar built by human technology should not be able to detect the Doomsday Base, so the only possibility that the fear is that a large-scale armed army has invaded.

But don't forget, Ye Bing is in a zombie den at this moment! Not to mention the distance, just within a thousand meters around here, there are no less than 3,000 zombies around! Being in such a terrifying zombie lair, and there are no important scientific research bases or big people around, the army will only come to sweep this kind of place if they are tired of it!

Moreover, according to the memories of Ye Bing's previous life, the army did not carry out large-scale zombie clean-up activities at all after the apocalypse, but only hoarded troops to defend one side after clearing a few traffic arteries, and the spectacular number of zombie nests did not move at all.

This was also the foreshadowing of the intensification of the zombie frenzy later, because the second catastrophe twenty days later strengthened all zombies, and the larger the zombie base left, the more first-order zombies were mutated. Later, by the time the army found out about this problem and thought about a sweep, it was too late. In front of the sea of first-order zombies that couldn't even break the heads with bullets from ordinary pistols, the human army was really fragile and terrifying.

Since there is no security issue for the time being, the first thing Ye Bing has to consider naturally becomes the development issue.

How?

Based on the current level of the main base, in addition to the Beam Tower, there are four buildings that can be built, namely the Tech Tree, the Mech Barracks, the Colonization Factory, and the Terraforming Table. Among them, Ye Bing knew the role of the first two buildings, and as for the last two, he also got some explanations from Natasha, which were used for equipment processing and terrain transformation. Among them, the repair of tights mainly relies on the factory of clothing.

(To add to that, it was mentioned earlier that the tights were upgraded in the tech tree, but it was actually not clear enough for Han to explain.) It should be said that the "technology" of the tights is upgraded in the technology tree, and the actual manufacturing and upgrading process is put in the colonization factory, which everyone will understand when you see it)

In this way, the usefulness of these four types of buildings is also clear.

The Mechanized Barracks helps to increase the military strength of the base.

The Colonization Factory helps to improve Ye Bing's personal abilities.

The terraforming platform can improve the terrain of the base {For example, if you raise the terrain in the protective circle by five meters, you don't have to worry about the attack of primary zombies, because they can't climb up at all.} Or simply drop the terrain by ten meters, and then seal the top, leaving only a small exit, so that the base can be built into an underground kingdom, which can also resist foreign invasions).

The Tech Tree can produce some special products and upgrade the overall technology of the base.

From the perspective of base development, the order of importance of these four buildings is roughly as follows: mechanical barracks> colonization factory> terraph platform> technology tree, but from the perspective of practical needs (to save Ji Xiaoxiao's father), the role of the technology tree is comparable to that of the colonization factory. But no matter how it ranks, the mechanical battalion should be in first place, which is not controversial.

After thinking about it for a long time, Ye Bing finally decided on the order in which the building should be built, but when this was determined, Ye Bing was embarrassed.

Alas, the bag is shy......

I thought that 8 points of energy was already a lot, but in the face of the expensive "10 energy cost" of the mechanical barracks, Ye Bing still had a sense of powerlessness.

So, do you have to endure one more day and save up 10 points of energy to build?

Just when Ye Bing fell into hesitation, a thought suddenly came to his mind!

Syllable!

His palm slammed the table, and the whole person stood up from the chair!

"Ahhh I'm so stupid that I could have removed 'it' from the options! ”

As Ye Bing spoke, he couldn't wait to look at an inconspicuous icon in the construction interface, and at the same time, a smug smile couldn't help but appear on the corner of his mouth:

"As long as I have 'them', I will soon be developed! Hahaha! ”

PS: Quizzes. Can book lovers guess what "it" Ye Bing is talking about?