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Humans were rushing on their way anxiously, and the beasts were also rushing on their way in a hurry, so the beast tide was not much slower than humans.

"Let's go, let's continue exploring the underground river."

Chu Yang did not continue to waste time at the Bird's Mouth Spring. He had been in a hurry these days.

With Peeta, the two returned to the main road of the underground river and began to move forward along the passage.

After a day and a night, Chu Yang found the fork again.

This fork had no water flow, but was diagonally upward.

Chu Yang and Peeta entered the fork and found that this place was similar to the entrance they had entered before, and it was also a natural cave.

It was a bit difficult to walk in the cave. Many places were large pieces of smooth rocks, and there was no place to stand, so they could only find a way to climb up.

However, this problem was not a problem for Chu Yang. He swung a hammer and smashed it, and he could easily make a few steps.

Going up along the cave, both knew that this must be another exit.

As for the inconvenience of the exit, Chu Yang has a flying hammer in his hand, so he doesn't have to worry about this problem.

As long as the mountain is not too thick, he can spend some time to dig it through, which is equivalent to leaving an excellent life passage for the human race.

After walking so far in the underground river, Chu Yang has realized the great value of this underground river.

If the scale of the beast tide covers the entire witch world, humans can hide in this underground river and continue to survive.

There is sufficient water here, plus the exit dug by Chu Yang, humans can completely launch a guerrilla tunnel warfare mode against the beast tide.

In the case of such a dense herd of beasts, humans don't have to worry about lack of food at all. One passage in and out is enough to guarantee the needs of humans in this world.

Moreover, the entrance of a cave is easier to defend than those villages.

Humans can take turns to fight with beasts at the entrance of the passage, day and night, or they can directly get a big stone to temporarily block the passage.

Such a stone gate is definitely not something that the beasts can push open with their intelligence.

The more Chu Yang thought about it, the more he felt that this underground river was of great use. He even thought that humans could temporarily abandon the surface world and move into the underground river to avoid the beast tide, which would save a lot of trouble.

Then when the beast tide stabilized, the wild beasts began to hunt each other, and the number began to steadily decrease, and humans would no longer have to face such great pressure.

Chu Yang talked about his ideas with Peeta, and Peeta nodded repeatedly.

"This is a good idea. If it is really dangerous outside, we can indeed hide in the underground river. Although it is a little dark inside, it is definitely safer than outside... Get some fluorite to solve the light problem."

"Well, then let Gu Qi communicate with other villages and persuade everyone to move underground and live in the cave temporarily. The problem of the beast tide will be basically solved."

During the chat, light began to shine at the end of the cave.

This is a natural cave with a ready-made cave entrance, which saved Chu Yang the time of digging a cave.

But after walking out of the cave entrance, Chu Yang knew why this cave entrance had not been discovered by anyone, and it looked completely uninhabited.

Because the exit of the cave is at the top of a steep mountain, there is no way down the mountain, and it is even more impossible for someone to climb up from below.

It was already bright at this time. Peeta walked around the top of the mountain and observed the surrounding terrain. He couldn't determine where this place was for a while.

But the good news is that there is no beast tide here, and the beast tide was finally left behind by them.

"There is no way. My previous village was near the Bird's Mouth Spring. I am not familiar with this place..."

Peeta was a little helpless: "There seems to be no village around, and I didn't see the business road. This should be a deeper hunting area."

"Can you determine the approximate location?"

"Bird's Mouth Spring is east, probably north, maybe... It should be near Deer Horn Village."

"Is Deer Horn Village in the east or west? Or south or north?"

"I don't know, I can't see it now. If it's night, I can use stargazing to determine the current location..."

Peeta is also helpless about the current situation. Many places in the mountains have no obvious features. Anyway, there are only mountains and trees, and the terrain is similar.

If it is not a place they are particularly familiar with, or a road they often walk on, it is difficult for these natives to figure out the direction.

As for the method of stargazing, it is also a method of determining the direction left by a ghost cultivator in the past. It is not very accurate and can only figure out the approximate location and direction.

Humans do have many ways to determine longitude and latitude, but Chu Yang does not know how to do it, and it may not be useful in this world.

So the two of them can only stare at each other now.

"Anyway, there is no beast tide here for the time being, and it can be regarded as a safe area. If Gu Qi and others arrive here, they should start from here and contact the surrounding villages..."

Chu Yang swung the hammer.

"So, no matter what, I have to open a way for everyone first..."

Opening a road is not difficult, but digging a staircase from the top of this mountain down will make the construction process a bit awkward.

And Chu Yang has to consider his foothold during construction. This is not like when he was a cultivator, he could remotely control the magic weapon and dig the mountain at any distance.

But this is not the biggest problem. Chu Yang can overcome the difficulty of construction. However, the stairs carved out on such a steep mountain are so inclined that they are not convenient for walking.

The warriors may be able to walk on this terrain as if it were flat ground, but what about ordinary villagers? What about the old, weak, women and children in the village?

If this place really becomes an evacuation point for each village, the inconvenient stairs will definitely be a life-threatening thing.

For example, if there happens to be a group of beasts chasing behind, the villagers who hesitate will fall on this staircase.

Chu Yang pondered for a long time, and then gestured the shape of the mountain in his mind, and finally decided to find a new exit.

Dig from the inside of the cave and dig a passage directly to the bottom of this small mountain.

However, it is a little dangerous to put the entrance at the bottom, because it may be discovered by the beasts passing by nearby, so the entrance needs to be concealed and cannot be completely close to the ground at the bottom.

Chu Yang thought about it for a while, then picked up the hammer and started working.

The workload this time is slightly larger, and the length of the excavated passage is also longer.

However, with the help of his spiritual sense, Chu Yang would at least not make a mistake in the direction of the hole, and would not end up working in vain.

After several hours of hard work, Chu Yang finally found the exit.

The exit was adjacent to a mountain peak, and wild animals usually would not choose this location to pass through.