After the barracks was built, the icon of the ore refinery, the most desired building of Han Dao, was lit up, showing that it could be built, and it would cost 5000 energy points to build.

At present, the number of remaining energy points in the base is zero, and according to the automatic absorption of 500 points per day in the main base, this means that no units can be built in ten days to save enough energy points to build the ore refinery, so ...... Using this leisure time to improve your strength is definitely the best choice at the moment.

The building is 30 floors high, which is relatively high in the surrounding area, and you can see most of the city from the rooftop.

Located on the plains, with a wide wilderness and a distant horizon at a glance, the city is not as big as expected, but it is full of high-rise buildings, and it can be seen that it was highly developed before the end of the world...... Suddenly, a special figure appeared in Han Dao's sight......

It was a head more than two meters high, the muscles on the body were like a hill high and grave, at this time this big guy was striding on the street, the crowded zombie tide could not stop its footsteps at all, from time to time he also grabbed an ordinary zombie and chewed a few bites and threw it away, and the road he walked on was basically a scene of people turning over on their backs.

"Mutants!" Han Dao's eyes lit up, 'Mutant' was his name for the zombies he had discovered so far, whose strength far surpassed that of their kind.

And this 'big man' is obviously an evolutionary, and his strength is definitely not weaker than that speed-type evolutionary, judging from his size, it should be a power-oriented evolutionary!

"Go downstairs! Fast! Han Dao turned around and opened the locked iron door on the rooftop, and without hesitation, he ran downstairs with three mobilized soldiers.

He decided to ambush the 'big man' zombie, according to its speed, he would pass by his building in about four minutes, Han Dao's plan was to occupy a room on the third floor near the corner of the street, it was the only room on the lower floor of the entire building with a strong security door and facing the street, as long as the machine gun was mounted on the window, he could stand up and shoot it, and the security door could block the zombies attracted by the gunshots.

"Huhu...... Fast! Don't let it run! ...... to the back, Han Dao was almost carried down the stairs by two mobilized soldiers for more than 20 floors, and then into the room......

"Commander! The target appeared within range, did it fire? Number asked softly.

"Fire! …… Whew! …… Exhaust everything...... Kill it by all means! Rushing to more than twenty floors in one breath, Han Dao still didn't recover and gasped for breath, but he still didn't forget to put down the cruel words.

"Yes! Fire! As One's voice fell, three tongues of fire erupted and struck the "big man" mutant in the neck.

Just as the mutant who was tearing off a thigh from the same kind had not yet come back to his senses, his thick neck was beaten to pieces, and his head was thrown high under the action of inertia, flying backwards, and No. 1 hurriedly threw away the machine gun in his hand, and threw the climbing claw around his hand a few times before throwing it violently, steadily hooking the mutant's head and pulling it back.

The degree of brain domain development has increased by 0.1%, and the current degree of development is 8.3%

The voice of Zhi Brain sounded, and the green crystals turned into powder in Han Dao's hands, and the energy part was converted into spiritual power.

For the next ten days, the zombie-infested ruined city was filled with the roar of machine guns in various places, and each shot represented the disappearance of a mutant...... The three mobilizers have become accustomed to hunting mutants, and they have become more and more closely coordinated with each other, and their procedural movements are extremely proficient.

"Is it the limit?" In a tall building, casually shaking off the crystal powder that had been absorbed, Han Dao looked disappointed, this was already the thirteenth green crystal he had absorbed, and his brain domain development level had reached 9% when he absorbed the ninth crystal, and his spiritual power could already penetrate his body, covering a range of thirty meters with himself as the center, and he could even control fist-sized stones flying all over the sky. However, since then, he has absorbed four crystals in a row and his improvement has been minimal.

While being confused and lost, Han Dao did not forget today's task, and ordered the main base to carry out the construction of the ore refinery, and the 5,000 energy points that had been saved for ten days were emptied in an instant.

"It's okay! …… It's okay! …… Is the energy point just the spent? ”

Han Dao silently comforted his bleeding heart

…………

Two minutes later

A garden-shaped building with a tall chimney appeared in Han Dao's consciousness space.

Name: Ore Refinery

Attributes: Used for refining ores, converting and harvesting energy, it has the most advanced technology, the highest energy conversion efficiency and ore refining technology.

At the same time, a huge mining truck with a very sci-fi flavor is parked next to it.

Name: Chrono Mining Vehicle

Attributes: Chrono conversion technology allows it to instantly reach any place with ore energy, and with it comes endless wealth!! Depending on the abundance of mineral sources, a minimum of 5,000 energy points can be collected per day, and a maximum of 20,000 points can be collected.

Click on the chariot construction bar, and sure enough, the icon of the chrono mining vehicle appeared, but the cost is scary, and it takes 100,000 energy points to one.

"It seems...... You won't be able to own more mining carts anytime soon, but even one will be more than ten times more than your previous energy revenue! Han Dao secretly thought happily.

After the ore refinery was built, the Chrono Mining Vehicle began to mine independently, and a circle of space-time power emanated from the body of the vehicle, wrapping the body, and the next moment, the huge mining vehicle instantly disappeared into Han Dao's consciousness space.

Thinking that when the mining cart appeared again, he would be able to get an income of 5,000 energy points, Han Dao was very happy.

However, the sudden sound of the prompt at the base made Han Dao's mood immediately drop to the freezing point again.

"Commander! …… Some of the core materials of the base were lost in the time and space transfer, resulting in the inability to build subsequent buildings, and the commander was requested to find and improve the core materials as soon as possible! ”

"Core information! …… Where to find it? ……”

"In this world, when time and space travel, in order to protect the core information, some of the materials are divided into twenty parts and scattered all over the world."

"Alright! …… Tell me exactly where to point! Han Dao said helplessly

"When the commander or base unit is close to ten kilometers of the missing data, the base can automatically detect it!"

“**！ Just say that you don't know if you will die? Han Dao's face was full of black lines, speechless to the extreme.

…………

In the afternoon, Han Dao, who was disgruntled, woke up, and the base reminded him that the chrono mining vehicle had returned once, bringing 5,000 energy points.

Only 500 emergency responses were left, and all the others chose to mobilize soldiers to build, in the post-apocalyptic world, one more armed force is one more life support.

By the dawn of the next day, there were already 9 more mobilized soldiers around Han Dao, plus the previous 3, a total of 12 troops, and 10 troops would continue to join in every day in the future, and the crowd tactics of the red police had begun to appear on a large scale, and Han Dao divided into two groups, each group of three, and began to conduct a carpet search of the entire city.

"Commander, detect the Agile Mutant in the City Center Hospital! The strength is several times stronger than the mutants encountered before, and a group of mobilized soldiers are all sacrificed! In the luxurious suite of a hotel building, No. 1 whispered in Han Dao's ear that since the number of troops was sufficient, the No. 2 and No. 3 mobilized soldiers were appointed by Han Dao as junior commanders, responsible for the management and task allocation of other troops, while the serious and flexible No. 1 was left by his side to protect himself.

"Hmm!" A mutant who can kill three heavily armed conscripts? This surprised Han Dao a little.

"Commander! …… This is a video from the scene."

The camera is shown in the doorway of a hospital, slowly advancing inside, apparently from a camera mounted above the head of a conscript.

The hospital is a frightening place, and the abandoned hospital in the last days has a strange atmosphere everywhere.

Unlike the streets crowded with zombies, the gloomy hospital corridor is full of dead bodies and bones, and there is not a single zombie in sight...... As I went deeper, I walked through a glass door, and the camera suddenly lit up, and it turned out that I had come to the backyard of the hospital.

Han Dao's eyes became solemn, and there was a layer of dark red blood plasma flowing on the ground in the backyard, and the combat boots stepped on the viscous plasma and swung in circles of oozing blood-colored water lines, and at the moment when the water ripples spread, the three mobilized soldiers seemed to have discovered something, and violently raised their muzzles and fired fiercely forward.

At the same time, a thin figure appeared in front of him......