At 12 o'clock in the afternoon, when the sky was dark, he carried a thick stone slab that had just been polished and walked to the main entrance of the stone castle. He gently put it down and stood it upright, matching the position of the entrance gate.

"This is the door wall in front of the gate." He patted the thick stone slab, which was seven or eight meters high. The bottom of the stone slab was inserted into the foundation. On both sides, Lao Li and Lao Zhou moved it in time to fix and stabilize the stone blocks. It immediately became stable. The entire stone fort was completely completed at this point.

This is a rectangular gray and white stone castle. It looks a bit primitive on the outside, but because it uses a large number of whole stones, it is very strong. And the load-bearing stone pillars inside are all made by Yu Hong's bare hands. Complete stone pillars. He first chiseled out a large thick stone slab, then cut the stone slab into stone pillars, then dragged them over with his bare hands, erected them, and filled the gaps with small stones and silt.

Of course, these are only auxiliary pillars. The largest load-bearing stone pillar in the real stone castle is more than two meters long and wide, and seven or eight meters high. It is dry-built with large stone bricks piece by piece. This is what Lao Zhou and Lao Li's craftsmanship.

"It's done! The next step is the sealing work. You can solve these problems and make two more wooden ladders for replacement. I will solve the problem of air purification." Yu Hong stepped back for a distance and looked at the newly built stone castle.

The stone castle is over eight meters high, with a length and width of more than ten meters. It looks like a large square, standing in the middle of the inner courtyard, occupying most of the area of ​​the inner courtyard. The original wooden houses in the courtyard have been demolished and merged. Enter the interior of the stone castle and build a new wooden room inside.

Because part of the reconstruction relied on stone walls, the materials of the wooden house were redundant. Lao Li and the others also built two more rooms, making a total of five rooms. Inside the stone castle, in addition to the load-bearing stone pillars, A two-story hall with nothing.

Bedrooms are built in the hall on the second floor. These wooden rooms occupy less than half of the space, and a small amount of space is left as a public area. The hall on the first floor is completely set aside for the layout of breeding rooms, toilets, exercise rooms and other functions. house.

The light bulbs that Yu Hong had accumulated before were put to use. There were hanging electric light poles in the public areas on each floor. The water pipes were also temporarily used by the public, and Lao Li even considered the design of the drainage system.

Yu Hong admired the stone castle for a while, and saw that everyone else was temporarily diluting the negative mood caused by the abandonment of the pyroxene mine due to this important event. He returned to the cave and looked at the enhanced countdown. There was still one day to go. End food reinforcement.

So I simply sat cross-legged in the basement and quietly thought about the next development direction.

After the radiation grenades and air purifiers are strengthened, I need to further strengthen the black lizard and black wind defense formations.

This time I can test my last idea, which is to use synthesis to add new materials, and continuously superimpose and strengthen something."

Theoretically, the Black Seal cannot strengthen an already strengthened thing, but if you add some new materials and change it to synthesis, you can bypass this mechanism. This time, in order to greatly improve the defense power, Yu Hong plans to do an extreme strengthen.

The so-called extreme strengthening is to strengthen things to the limit at the cost of consuming all one's physical strength and energy. Just like the original silver talisman formation, this is how it came about.

As for the Black Lizard and Black Wind defensive formations, he was a little hesitant as to which one should be strengthened first.

If you strengthen the black lizard, you can expand the flexibility, mobility, and even expand the safety area of ​​the entire camp. However, the black lizard is not suitable when dealing with a large number of opponents. The last time Suren attacked the camp, it was of no use.

"The strengthening of the black wind defense formation can strengthen the absolute security of the existing camp. This formation is highly targeted against intensive black disasters. It played a key role in dealing with the large number of shadows driven by Hayato last time.

"The main role." After thinking about it, Yu Hong decided to strengthen the formation first.

Ensure the basic safety first and then talk about other things.

Extreme strengthening is destined to take a long time. The only thing that can support it during this period is radiation grenades, the existing black lizards, and his own inner energy. When this protective power drops sharply, Yu Hong

The only hope is to avoid a new high-risk black disaster!

Otherwise, the current camp will be in trouble.

*

The sky is overcast and gray.

That kind of gray is not a pure color, but a dirty black gray that seems to have been repeatedly stained by countless stains and can never be washed away. In the north of Donghe River, on the endless Qinchuan Plateau, the vast loess

, also dyed with a thin layer of gray by the gray sky.

Among the layers of earth like skin folds, stands a huge fortress made entirely of gray concrete. The top of the fortress is sealed with high-strength synthetic glass to block rain and snow.

Inside, there are gray buildings built one after another. Buzz.

As a buzzing sound sounded, a huge door appeared on one side of the wall of the fortress.

A group of survivors, wrapped in pyroxene blankets and holding wooden sticks in their hands as crutches, walked through the door with difficulty and slowly, and were inspected by layers of heavily armed protection personnel inside. At the far end of the inspection level, a group of survivors

On the roof of a five-story building, two tall men stood looking down.

Both of them were wearing full bulletproof suits, which were models not currently in circulation on the market. There was also the word Aurora Laboratory in the corner. Their faces were shrouded in thick dark red helmets, and their expressions could not be seen.

Only the suit, which was as thick and bulky as a bear, gave people a strong sense of oppression.

"Has the communication not been restored yet?" the shorter man asked in a low voice. "We don't have much time. On the satellite observation cloud map, there are a total of four high-risk black disasters, and two of them are already approaching here." "Commander, evil.

The affected area of ​​​​the yard is too large. Although our side has temporarily recovered, other strongholds may be caught off guard and attacked..." Another person answered respectfully.

"How many more Donghe strongholds can be determined now?" The man called the commander asked again.

"Before the high-risk black disaster broke out, there were seventy-four, but now according to the special drone radar scan, there are only forty-two. The main reason is that after the upper class moved to New Aurora City, they took away too many kinds of materials and weapons, which led to the loss of defense lines.

It collapsed early and there were too many casualties." Another person answered.

"Based on the results of my last communication search, have you found the underground nuclear base where Guan Cao is located?" the commander spoke again.

"It has been found. According to the detection, the red radiation concentration inside has reached more than 800. It is impossible for anyone to survive at this concentration..." This answer made the commander fall silent.

He has very few friends. As the people around him become more and more afraid of him, as his position becomes higher and higher, and as his body changes become more and more serious, it has even exceeded the predicted progress of the laboratory. Now , no one in the entire stronghold dared to raise their head and talk to him.

Guan Cao and Wei Song were his only friends, and now, one of them has disappeared.

"What about Yu Hong? The location of Baiqiu Village has been determined. Can you contact him?" He paused and asked again.

"I'm afraid I can't do this. The area over there is currently under the charming envelope of a high-risk black disaster. Not only that, there are also high-risk bugs in tight suits. As you know, bugs are the most dangerous type among the eight-level high-risk types. "They mainly live in groups, similar to multi-eyed birds." Another person quickly answered.

"As soon as possible. Yu Hong from Baiqiu Village has mastered a lot of precious information. He should be a top research talent on the same level as me. Let the laboratory produce more extracts. If it doesn't work, we will force it forward. It's just too much. Dead spot." The commander said solemnly.

"However, the current output of extracting bait materials has reached its limit. If there are more... I'm afraid it won't be able to hold on." Another person thought.

"It doesn't matter. If you don't have enough, go and catch more. In this world, as long as they can survive, many people are willing to do anything..." The commander suddenly raised his head and looked outside the city in the distance. On the yellow-gray land in the distance, a group of people were riding motorcycles. The tattered pyroxene blanket cloak on the survivor's body was constantly being pulled by the strong wind, making a hunting sound.

This is a group of around twenty survivors. They have pyroxene blankets, weapons, equipment, food, and drinking water. It is obvious that this is a group of people who have just escaped from the stronghold.

But they are running for their lives now.

Two vague human shapes made of gray and black insects were chasing after them quickly. Poof.

Suddenly, a human figure suddenly moved forward, its body spread out, and turned into flying insects all over the sky. It instantly pounced on the two people on the motorcycle. The two people screamed, and their bodies were like balloons, rapidly expanding and getting bigger, and then...

Bang!!

The two of them exploded in just a few seconds, and a large number of small black and gray insects the size of gravel flew out of their bodies. These small insects soon formed a new line of insect-men.

"The insect men are here, close the door." The commander said calmly. "Let the blood lead the ninth team out, and bring the expulsion fluid to lure them away." "The people in the ninth team are all dead, commander."

"Then it will be Team 8. You will reorganize Team 9 from the newcomers later." The commander said calmly, "If you want to get food, water, and medicine, you have to risk your life." Yu Hong carefully watched the food box that was about to end its countdown.

In the wooden box used to store dried meat, mushrooms and wild vegetables, the dark red countdown is only at the last minute, and it will end completely. Ahem.

Yu Hong himself suddenly couldn't hold it back and coughed twice.

His throat suddenly felt dry and itchy, which made him frown, feeling that something was wrong.

Even I can't bear it? This air." I thought I didn't need to wear a breathing valve, but I didn't expect it now. At this moment, the wooden box suddenly blurred for a moment.

When it became clear again, the food inside had changed drastically.

The same nutritional cream as before was placed in a wooden box, with a thin blue plastic sealed package on the outside. There was an instruction label on the surface as usual.

Yu Hong picked it up and looked at it.

Nutritional paste: Also known as comprehensive multi-functional meal replacement paste, adults only need to take one tube a day to supplement all the required nutrients.

"It's done..." He breathed a sigh of relief and quickly counted. There were six hundred sticks in the box, which was exactly the right number. It could feed six adults for three months. After converting the supplies before strengthening, it was enough for one month's food strengthening.

Three months' supply.

Next, it’s time for the air purifier.”

After confirming that the nutritional ointment was ok, he probably copied it from somewhere. Yu Hong quickly walked to the air purifier.

The stone castle was built, the food crisis was temporarily solved, and the air problem was dealt with immediately. He stretched out his hand and pressed it on the purifier.

Strengthen the purification system, direction: filtering and detecting substances harmful to human body in the air, especially the special substances in the outside air that cause people to cough.

Yu Hong didn't know what caused the cough, but he planned to give it a try and point directly at the thing with the black seal. As long as the air problem could be solved as soon as possible, he could start his extreme strengthening plan. After all, the formation is the core that determines the safety of the camp.
Chapter completed!