The entrance of the cave is not small, Pan Yue and they will run to the tall standard in the future, the width is ten meters, the height is five meters, it is estimated that it will be easy to change to a two-way lane in the future!

"What is this?" Xiaoguang saw some holes in the wall outside the cave entrance. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

"Oh, this is the ventilation hole we drilled in advance, through these ventilation holes to exhaust the air inside, and then send in fresh air, which can prevent the explosion of too much gas content inside, and also ensure the safety of the air near the hole after opening." Pan Yue briefly introduced.

The tunnel at the entrance is about 150 meters long, with temporary lights on both sides and above, and a diesel generator outside to provide electricity. There was a wind blowing in the cave, and the air was a little humid and had some strange smells.

"What does it smell like?" Zheng Haotian frowned.

"It's the smell of the air inside the cave. Originally, the air composition here was slightly different from the outside, but now after ventilation, it is much better. "And we deduced that the hole itself has a place to communicate with the outside world, but the opening is too small, and the inside is too big, which causes the current difference between the inside and outside air but is very small." ”

"Is there one?" Xiaoguang asked in surprise.

"Yes! We've found two very small holes to communicate air with the outside. This is actually very good for us, you must know that we will make ventilation holes in the future, such natural ventilation holes actually save us trouble, and we can modify it a little in the future. Pan Yue said with satisfaction.

The walls of the tunnel are rough and uneven, and traces of blasting can be seen in many places. The group soon walked to the other end of the tunnel, and under the light, a tall canyon appeared in front of Zhang Xiaoguang and others!!

"It's so high!!" Xiaoguang looked up, the light above couldn't shine, it was pitch black! Pan Yue next to him used the searchlight in his hand to shine and saw the high ceiling of the cave! There are some stalactites on it, like an upside-down sword!

"It's about 30 meters here, and it's 10 stories high. Watch your step! Pan Yue reminded.

The feet have been leveled by the engineering team, but they are still uneven, and there is even ice in some places. "Why is there ice here?" Lei Gang behind him stepped on it with his foot, but he didn't expect it to splash water! "Holy!" Lei Tong next to him was splashed on his face, and looked at the perpetrator Lei Gang speechlessly, Lei Gang shrugged.

"There's an underground river here, but it's more appropriate to call it an underground creek now. Based on the humidity of the air here, I suspect that there is a hot spring in the cave, but I haven't found it yet. Pan Yue turned around and said, "Now the cold wind outside is coming in, so there is some ice near the door, be careful not to slip." ”

A few people came in a few steps before they saw the specific situation of the canyon!

The whole canyon is roughly east-west, like an L, with the hole as the dividing line, some east to the southeast, and some west to the southwest, Pan Yuexuan's place to open the door is the shortest place in the canyon from the outside world, that is, the right-angle position of the L shape! It seems that Pan Yue chose this place to open the door very accurately!

This section is 50 meters wide, and the height of the ground varies greatly, and in some places there is a drop of more than two meters within a few meters. There are some tall stone stalactites in the cave, of all kinds, some of which stand up to the sky like pillars. A small stream runs from east to west, but now it has formed a thin layer of ice. The entrance to the cave is on the southern wall of the canyon, like a hanging needle pierced into the veins of a giant!

"More than 300 meters to the west, you will reach the first space!" Pan Yue pointed westward.

Everyone looked west, and a simple paved path led to the southwest under the lights. But when I looked southeast in the other direction behind me, there were only two lights in the distance, and it was pitch black in the distance. "What's going on in the east?" Gao Zhenshan asked.

"The east side was surveyed all the way by us, and according to our survey results, there was no large space suitable for living in that direction, so we simply ignored it." Pan Yue turned around and said, "However, that direction is very willing to lead directly to the valley of the general." ”

"Oh?" Gao Zhenshan smiled, "Then if it is opened, this cave will become a passage." ”

"I guess so." Pan Yue smiled, "But such a narrow passage really has no practical significance. If you want to talk about transportation or something, or the road outside is running fast, we really don't need to waste manpower and material resources in the east now! ”

Gao Zhenshan nodded, "That's right. ”

Everyone followed Pan Yue, all the way to the west, more than 300 meters quickly walked over, and the eyes suddenly opened up!

But there is no difference between cheerful and uncheerful, for it is pitch black in the distance, and only the south side near the mountain wall has some lights along the makeshift path! These lights can only illuminate the path and the distance of about 20 meters near the path. At this distance, all that can be seen is patches of white jade-like ground, or like terraces, or like plains!

"These are all water stains left behind by the current, including on these mountain walls." Pan Yue pointed to the mountain wall next to him, and everyone looked at it, and sure enough, the mountain wall was also in the shape of white layers. Xiaoguang touches it, and it feels very slippery! "I think it was an underground river in the earliest days, and it took tens of millions of years for the river to become what it is now."

"Tens of millions of years?" Lei Tong behind him said in surprise!

"Young man, we're talking about Earth now!" Pan Yue turned around with a smile and said, "Tens of millions of years is only a short time for the earth!" ”

Lei Tong stuck out his tongue!

"Is there a square kilometer here?" Zheng Haotian cares about construction, he tries to look into the distance, but in addition to pitch black, it is pitch black!

"No problem, it can only be bigger than one square kilometer!" Pan Yue said affirmatively, "I sent someone in yesterday to take a turn, and it's probably an irregular triangle here. Of course, there are still some stone stalactite pillars in the middle, whether these stone pillars can be removed in the future, we have to go through scientific research to decide! After speaking, Pan Yue used a searchlight to shine inside, and sure enough, there were some huge white objects faintly inside.

Xiaoguang nodded and smiled, "That's good!" Nothing else, this alone is enough for us to live! ”

"Didn't pursue it!" Zheng Haotian said with a smile, "Excluding the stone stalactites in the middle, I estimate that the area that can be used here will not be much larger than the Qingshan base, and at most it will be the area of the two Qingshan bases." If we really want to develop here for a long time, we really have to find a bigger place than here! ”

"That's right, with the attraction of our Silver Dawn, maybe there will be a lot of people coming to join us in the future!" Qin Yun, who followed behind, said.

"What do you mean, maybe there will be a lot!" Zhang Kun said affirmatively, "How many people were there in our outer city at the beginning, they all came to join us!" ”

"It's a pity that this is a wasteland, and there are few people within hundreds of kilometers!" Sun Le poured a basin of cold water on the two of them in the back, Zhang Kun and the two thought about it, it was really so!

"Well, for the sake of future development, let's move on!" Xiaoguang smiled.

Everyone continued to go deeper, walking through this open field, and the terrain narrowed again. It's a long stretch of road, probably a few kilometers away! Moreover, the terrain here is complex, wide and narrow, and the terrain is uneven! The narrow place can even only pass sideways, and the wide place is more than 100 meters! There is a bottomless crack in one of them! Pan Yue said that this place must be filled, and the following may be another channel washed out of this underground river.

"It's only been two days, how did you survey so far!" Stepping on the makeshift steel-framed path, Xiaoguang couldn't help but admire Pan Yue and his survey team!

"It's been three days, actually! I was so excited on the first day that I forgot to tell you, and I only remembered it yesterday. Pan Yue smiled embarrassedly, "And we have already thought that this will be the case inside, after all, we have seen a lot of underground caves in geology, and most of them are like this, so we have made sufficient preparations in advance, including steel frames and cables." ”

All the way up and down, everyone finally walked over after three hours!

"This is it!" Pan Yue pointed forward!

Everyone stared and looked ahead, but just like just now, except for pitch black, the only thing they could see was the path under their feet!

"Is it big here?" Xiaoguang shone out with the searchlight in his hand, but the pillar of light disappeared as if in the darkness, and he couldn't see his head at all! Far, far away, there were a lot of bright lights like fireflies flashing and flashing, "What's that?" Why is it still shining? ”

"That's our staff, and you're seeing their lighting." Pan Yue took out a walkie-talkie, "Lao Hu, how is your work progressing there?" ”

A bright spot in the distance seems to be brighter than the others, it should be the person named Lao Hu who took a photo, "We are about to go out, this place is too big, it is estimated that it will take a few days to explore clearly!" How did you get in? A man's voice over the intercom.

"It's the political commissar, they're here, I'll accompany you to have a look!" Pan Yue replied.

"Okay, then you see." The old nonsense was silent after saying a word, and he was probably doing his job.

Everyone looked at the bright spots in the distance and was speechless, how far away is this, and they need to use walkie-talkies to talk .......

Continuing to move westward, in the place where the canyon will enter a narrow state again, there is a temporary supply point set up by the geological team, Zhang Xiaoguang and the others took a little rest and ate something.

"It's midnight now, do you want to get some sleep?" Pan Yue asked.

"I'm okay!" Xiaoguang just came to such a place, fresh is not good, there is no sleepiness! Pan Yue looked at the others again, and they were all very excited!

"Okay, let's not sleep tonight, and we'll rest when we're done! Let's go! Pan Yue shouted, and everyone followed Pan Yue to move forward!

This time, I walked for a few more hours, and finally arrived at the place Pan Yue said!

There are a lot of geologists in front of them who are still working, some instruments make all kinds of sounds, and the lights illuminate everything nearby, but in front of them, there is a river!!

"What is this?" Xiaoguang looked at the river in front of him in a daze. In the middle of the towering mountain walls on both sides is the water surface where you can't see the end of a river, but the other end of the river is not visible at all!

"This is supposed to be a remnant of an underground channel." Pan Yue pointed to the surface of the water, "The bed of the underground river is very uneven, and there is even a deep ditch like the one we just saw, and people can't get up if they fall down, so they must not wade over!" We didn't have water transport with us, so we couldn't get over at all. ”

"I see." Zheng Haotian nodded, "It's okay, the two caves in front are enough for us." As for the underground river here, it will be solved slowly later. ”

Everyone stayed here for a while before they started to walk outside, and by the time they returned outside through the two spaces, it was already noon the next day!

The most valuable supernatural book list in history!

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