The entrance to the underworld has been blocked after the outbreak of the dead.

However, how could the blockade be useful to Chu Feng?

The whole city of dawn is his. The place sealed off by the city of dawn is the place that he can only enter and leave with his permission.

After making a good decision, Chu Feng takes Su Yuyan, ye Xiaohui and Yiyi to the underground.

Among the three men he took, Yiyi was a very important fighting force.

Yiyi's talent is in the top of Chu Feng's list, which is much higher than Chu Feng himself.

After knowing her special identity, Yiyi has completely given up the carefree life she should have enjoyed as an 11 year old girl and devoted most of her time to cultivation.

With the help of the Holy Cross and the blasphemer's sword, Yiyi's fighting power has quietly become the city of dawn, with the exception of chufeng, the strongest human being.

Of course, this is paper strength.

In the real fight, psychological quality is also a very key factor, which determines how much strength you can transform from paper to real strength.

When he went to the underground world again, Chu Feng did not move in the direction of the realm of the dead as he did last time. Instead, he walked along the tunnel that the miners had dug and came to the depth of 800 meters underground.

In the past, it was incredible to be able to dig 800 meters underground.

But in this extraordinary era, it is only a matter of time to excavate 800 meters, and the time is not too long. It is measured in days.

With the concerted efforts of the demons and human beings, it is not very difficult to dig a survival base at the depth of 800 meters.

If we don't have to consider the problem of ventilation, many survival bases have to build their nests underground.

But as long as the problem of ventilation needs to be considered, this kind of thing is very difficult to implement. It's not that the problem of ventilation is very difficult to solve. The main problem is that since you need ventilation, how can the confidentiality of the survival base be solved?

An unclassified underground survival base, if others block the entrance, it is to catch turtles in a jar.

Once the fire goes down, the whole base is almost gone.

So in the last days, although there are many survivors living underground, most of them are still in the sewers of the city in the past. At least the sewers are in all directions, and it is more convenient to escape.

Of course, even if you live in the sewer, you have to have a certain strength. Otherwise, fighting with those mutated rats in the sewer will not necessarily make you who you are.

When Chu Feng was desperate, he also lived in the sewer for a long time.

That's the shadow that he can't erase up to now, which also leads to the reason why he has to let himself live on the surface even if he gambles with his own life and takes risks with his own life.

Even if he died, he was not willing to repeat that kind of life, let alone let his family live that kind of life.

"There seems to be nothing under the ground! In addition to some materials that have become special minerals as the environment changes, there are enough minerals on the surface to be excavated. "

Su YuYan's voice brings Chu Feng back to reality.

Chu Feng shook his head hard and put those bad memories behind him.

Those dark memories are buried in the bottom of my heart, just as a warning. What he has to do now is to avoid repeating the same mistakes.

"Mountain giant, come here."

At Chu Feng's command, the mountain giant, who was 80 meters tall, came to the same position as them along the passage.

Although the mountain giant's body is very huge, as early as the beginning of digging underground, Chu Feng specially asked that the scale should be able to allow the mountain giant to pass.

In fact, in such an extraordinary era, this kind of requirement is better.

For the passage that only a few people are allowed to pass through, you should pay attention to the gravel carefully, but for the large passage, you only need to clean up the earth and stone of the earth system powers.

"Mountain giant, at the beginning, was just a stone man. It was a natural born stone man that I found when I bought glasses frames. You can understand that the stone became the essence."

Chu Feng said, "but in the ancient books about the Yan Protoss that I have obtained, if the first stone man can be born, there is a great probability that the second and third stone man will be born until a stone man tribe is formed, or the mineral resources in that area will be completely absorbed until they are drained."

Hearing Chu Feng explain these, we all realize that there is something wrong.

The force on the earth is increasing with each passing day. Every day it is more than the day before. It is almost impossible for veins to be drained, because no matter how many veins they dig, there will be more force to add back.

"Well, this stone man is probably not born?"

Yiyi Chisheng analyzes that she is also trying to learn to judge the danger and analyze the environment by herself.To survive in the wild, strength is fundamental, but wisdom is the key to survival.

"Yes, I asked Lu Qiu to come to dawning city later to observe the trend of the mountains here, but he told me that the veins here did not have the conditions for the birth of spirits. Then, the mountain giant I accepted is probably not a natural born, but a stone man who was born long ago and fell into deep sleep with the exhaustion of Yuan Li.

Of course, there is another possibility, that is, the vein itself is the body of a super large mountain giant. The stone man I accept is the child of the lost mountain giant, but it was sealed by the mountain giant. It was not until this era of force recovery that it was revived and caught by me by coincidence. "

Chu Feng said his guess.

At the beginning, when he accepted the stone man, he was expecting to accept a stone man tribe.

But unexpectedly, there is only one stone man here.

However, this is not a bad thing.

Although the stone people's tribe is precious, if their guess becomes a reality, the harvest is no less than a stone people's tribe.

"If you say that, is there any way to prove it?"

Su Yuyan knows that Chu Feng is never a person who likes to talk nonsense. Since Chu Feng said this, he will try to confirm it or get something from this guess.

"I've done what I've confirmed."

Chu Feng pointed to his feet, "even if the veins of ChiYan gold are not evenly distributed, at least there should be a rule. Where there are more mines and where there are less mines, but the stones here have been excavated, but even if there is a little ChiYan gold, the veins of Youlan magic gold nearby are also so. The scope is too concentrated."