After pacifying the hell three dogs, Chu Feng dropped 1500 dark legions of various arms from hell, and came to the real world through the channel here.

Among the 1500 dark legions, 1000 live in Yuanfu world, 500 in mines, and the other side of hell only needs to be handed over to the hellhounds.

In order to supervise the dark army here, Chu Feng arranged two hellhounds.

After all, the contract he signed with trolls and other races actually has a certain limit of benefits. If the other party violates the contract, he will be punished, but such punishment will never die.

But the most important reason why trolls don't violate the contract is that if trolls violate the contract, Chu Feng can order to destroy the trolls and wipe out their tribe in hell. However, in order to prevent accidents, Chu Feng sent a more trusted hellhounds.

Then he gave an order.

[look for a lot of whole rocks in hell, then cut and polish them into strips. 】

among them, the rock samples have been left by Chu Feng.

This order is that Chu Feng wants to build a castle in the real world, a super large castle covering the whole mine, which is specially used to protect the two boundary passageways.

After all, the two boundary channel is the most important core of the two boundary trade. Of course, nothing can be done.

Although Chu Feng can destroy the two channels in Yuan mansion, it is also a great harm to him.

In the world of Yuanfu, Chu Feng mobilized a large number of rocks to encircle the place between the two passages, so that the creatures passing here would not find the particularity of the world of Yuanfu.

After all this, Chu Feng felt that it was almost done.

The two boundary channels have been established, and the rest is trade.

He can also send troops in from time to time to train in hell.

However, considering the confidentiality of the two channels, Chu Feng put out his plan to die until he had a more suitable means.

Entering the yuan mansion again, Chu Feng continued to observe the function of the yuan mansion world.

A piece of refined iron ore fell into his hands, and then the ore quickly decomposed into black iron ore, and then the ore changed again into silver white.

"Black iron and pure gold, so soon?"

Chu Feng can't help but be a little stunned. Although he has been using Tiandi seal to transform part of the black iron ore, this process takes a certain amount of time.

Therefore, he has not started mass production of the weapons made of pure iron and gold.

However, in Yuanfu, he did it easily.

"This is an analysis of the essence of material structure and energy structure, that is to say, I can easily change the subtle material structure in the world of Yuanfu."

In the past, Chu Feng could only restore everything to the essential vitality in the yuan mansion, and then use the vitality to combine, or use the vitality to change the material structure. But now he has been able to skip this step and directly change the material structure.

"What's the difference between my doing this and having a heaven and earth in Yuanfu?"

Chu Feng's eyes suddenly brightened, and then his mind moved. He imitated the structure of Tiandi seal and created a seal in the Yuan Dynasty.

This seal is only the size of a palm. It is crystal clear as jade and white as tallow.

This is made of jade by Chu Feng, which is in line with the ancient symbol of imperial power.

On the top of the seal is a long white dragon circling, and there is no inscription under it.

Chu Feng's mind moved, and then controlled Yuan Li to force a mouthful of blood essence from his body into the jade seal. The jade seal seemed to have luster.

Through this jade seal, Chu Feng felt that he gave orders to the jade seal, and then he could let it go, and the jade seal could carry out his will.

"Wait, if I can directly interfere with the structure of matter, can I do more?"

Chu Feng's heart read a move, a submachine gun has been eliminated by him, but has not had time to throw it away appeared in his hands, and then a large number of black iron gathered in his hands, constantly changing shape in his hands, and finally formed a submachine gun.

"Sure enough, I can analyze everything in my world, but it's a little expensive."

Chu Feng's eyes lit up, "although the consumption is a little big, if he can copy some precise objects or very important substances, such as ·····"

he suddenly thought of a substance, and then his heart trembled.

The wisdom of human beings is endless. The weapons created by human beings are enough to destroy human beings. Although most of human weapons have been eliminated, there are still some weapons that can play a huge role until now.

One of them is called the ultimate weapon of human beings. Its raw materials are extremely simple.

Its power has brought the balance of terror to mankind······"Whether it can be done or not, I must not easily expose my ability to use this kind of weapon, otherwise, I will become the object of exclusion of the whole mankind."

Chu Feng really firmly believes that he is the human camp, but he also understands the darkness of human nature. What he shows now has aroused the envy of many people, but also attracted a lot of jealousy. Only if he becomes more powerful, then the whole human race will begin to exclude him.

It's really hard for human beings to tolerate things that are different from themselves.

The Chinese nation is the most inclusive nation in the world, but even the Chinese people, there is still a limit of inclusiveness.

Therefore, in order not to be excluded, the best way is to hide yourself.

However, he soon thought of another weapon, called metal hydrogen. The explosive made of metal hydrogen is 30-40 times more powerful than TNT explosive. Human beings began to develop this kind of material in the old times, but it was unable to put into mass production and combat. It didn't start mass production until the third year of the end of the world.

Although at that time it was already full of the strong, but the metal hydrogen bomb still has a huge role.

Of course, it's not enough to deal with the strong, but it's the most effective way to clean up ordinary troops without wasting a lot of resources.

In the era when precision high-tech weapons failed, machine guns were not powerful enough, and cannons were eliminated because they were too bulky, metal hydrogen played a huge role in the war of human beings against the alien world.

In the beginning, it was the United States that put into mass production, and then sold it to the whole world at a high price. As a result, Huaxia also developed the means of mass production. For a long time, they did not dare to use the sea of people tactics to fight against the earth.

"If this kind of weapon can really come out ahead of time, it will give a surprise to the alien race!"

Chu Feng's eyes also flashed a look of surprise, because the raw material of metal hydrogen is too simple.