Ye Zhenzhen was very curious, and followed the direction of the smoke to the entrance of the underground cave. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

The entrance of the underground cave is more than one meter wide, half of the hole is on the ground, half of it is hidden in the stone wall of the cave, and the hole extends obliquely to the ground, and you can't see how deep and far it is.

The smoke entered the underground pit and dissipated, relying on her own common sense of life, Ye Zhenzhen sighed: "This underground pit is actually connected to the outside world. ”

Nan Zhiqiao is not surprised, "As soon as we entered the cave just now, I found that the air in this cave is fresh, and there is no dull feeling at all, which means that this cave is not closed, it has a connection with the outside world, I guess, this underground cave is the exit to connect with the outside world." ”

"Oh, that's why Senior Nan are you sure this underground cave is not a snake cave?"

"Well, that's why I decided to stay. ”

Nan Zhiqiao continued to add firewood to the fire, and Ye Zhenzhen guarded the entrance of the underground cave, observed again, and wondered: "How did such a strange hole come to be?"

Nan Zhiqiao stirred the noodles in the iron pot, and the steaming heat with the aroma of mushroom beef permeated the cave, looking at Ye Zhenzhen's appearance of 100,000 whys, Nan Zhiqiao explained: "This is a karst landform, there are a thousand strange caves are nothing, you just need to understand the principle of karst landform formation." ”

"The principle of karst formation is the result of long-term dissolution of groundwater in limestone areas. ”

"Okay, the noodles are ready to eat. Nan Zhiqiao pulled Ye Zhenzhen back from the state of 100,000 whys.

Compared with the wild vegetable noodles at noon, this mushroom beef noodles tasted better in the evening, and after eating two bowls of noodles, the sleepiness that had accumulated over two days came up.

After putting away the pots and bowls, moving the fire to some positions, and adding some firewood, Ye Zhenzhen got into her tent and fell asleep as soon as she closed her eyes.

Nan Zhiqiao took care of the fire for a while, and before going to sleep, he put a round flat guard device around the tent of the two, which looked like a small sweeping robot at first glance, but in fact it was an alarm with GPS positioning function and infrared detection function, which was most suitable for this kind of wild camping vigilance task.

After installing the guard, Nan Zhiqiao also got into his tent, and the cave was quiet, only the crackling sound of the campfire burning, and the red light from the guard shining in the cave from time to time.

――

In her sleep, Ye Zhenzhen seemed to hear a rumbling thunder in the distance, and half-asleep, Zhenzhen turned over and muttered in her heart: "Why is there thunder again? Could it be the sound of bats returning to their caves? But this sound seems to be much louder than 'thunder on a sunny day'." ”

Listening to the faint thunder, Ye Zhenzhen fell asleep in a daze again.

"Wake up, wake up......"

This time it was Nan Zhiqiao's voice, Ye Zhenzhen could hear it clearly, and a clever man sat up from his sleeping bag, unzipped the tent, and saw Nan Zhiqiao standing outside the tent at a glance.

Nan Zhiqiao held a flashlight in one hand, looked out of the cave, looked back at Ye Zhenzhen's tent from time to time, and saw Zhen Zhen poking her head out of the tent, Nan Zhiqiao said anxiously: "Zhen Zhen, get dressed quickly." ”

Ye Zhenzhen had just woken up and was still a little dazed, but looking at Nan Zhiqiao's appearance, something urgent must have happened.

Without bothering to ask more, Zhen Zhen got dressed and got out of the tent, "Senior Nan, what's going on?"

"It's raining. ”

Ye Zhenzhen looked out of the cave, lightning and thunder, torrential rain poured, it turned out that the thunder she heard in her sleep just now was real.

"I looked at the weather forecast before, saying that there was a thundershower in L City today, but I didn't expect the rain to be so heavy on this side of the forest canyon. ”

Nan Zhiqiao took two steps to the entrance of the cave, and looked towards the west of the valley, the sky in the west was full of black clouds, and lightning continued to pierce the night, and the rumbling thunder also came from the west, it seemed that the rain in the west was even heavier than that of the cave.

The bonfire in the cave has been extinguished, but with the light of flashlights and lights hanging in the tent, you can still see the scene inside the cave, and the lightning flickering outside the cave, with the violent storm, really feels like being in a horror movie scene.

Although Ye Zhenzhen was a little scared in her heart, because Nan Zhiqiao was by her side, she didn't think that such a wilderness rainstorm night was dangerous, but Nan Zhiqiao's expression made Zhen Zhen even more worried, "Senior Nan, it's just a thunderstorm, we are in this cave, we just can avoid this rain, is there anything wrong with your serious expression?"

The strong wind mixed with large raindrops dripping down the hole, Nan Zhiqiao's face was also wet, and he took two steps back, Nan Zhiqiao frowned, and said solemnly: "This rain is falling too quickly and too fast, and it is easy to cause flash floods." ”

Ye Zhenzhen still didn't care, "Mountain floods are very common in the mountainous areas of this area, especially in the rainy season, but the cave we are in now is a long distance from the river beach at the bottom of the valley, even if there is a flash flood, it will not flood us here." ”

Nan Zhiqiao shook his head, "Not necessarily, when I came up from the valley in the evening, I found that from the valley bottom to this cave, there were traces of flowing water all the way, although there were also grass and trees near the entrance of this cave, but the grass and trees were very sparse, which shows that the grass and trees near the cave entrance are often destroyed, such an inaccessible place, the grass and trees are destroyed, which can only mean that this place will also be attacked by flash floods." ”

Nan Zhiqiao said it reasonably, and Ye Zhenzhen began to believe it in her heart, and really felt that if a flash flood broke out, it would really rush to this cave.

Ye Zhenzhen was nervous, turned around and began to pack the tent.

"Zhenzhen, what are you doing?"

"Pack up your tent, pack your backpack and go, leave the cave and go up the valley, it's better to be in the rain than to drown in the cave. Ye Zhenzhen kept moving her hands as she spoke, and in the blink of an eye, most of the tent had been put away.

Nan Zhiqiao glanced at the mechanical watch on his wrist, it was four o'clock in the morning, it was the darkest time before dawn, and he was still a little hesitant on this rainy night, whether to take Ye Zhenzhen out of the cave, or bet that a flash flood would not break out, but he didn't expect Ye Zhenzhen to hear the current situation, and the decision was still very simple.

Nan Zhiqiao also began to pack the tent, and in five minutes, the two of them had already put the sorted backpacks on their shoulders.

The jackets on the two of them have the effect of temporary waterproofing, and they can last for a while in the rain, Nan Zhiqiao was just about to step out of the hole, but was dragged back by Ye Zhenzhen, "Senior Nan, I'll go ahead." ”

Nan Zhiqiao objected, "No, I'll go ahead, explore the road first, and you follow me." ”

Ye Zhenzhen squeezed in front of Nan Zhiqiao, "No, Senior Nan, you have night blindness, you can't see the road clearly in this weather, or I'm exploring the road in front." ”

"No......"

Before they got out of the cave, the two began to argue, Nan Zhiqiao was stubborn, Ye Zhenzhen was stubborn, and neither of them gave in for the safety of the other party.

"Boom!" there was a loud bang, accompanied by a violent shaking of the ground.

The two people in the cave felt a shake at the same time, and after being shocked, they turned their heads to look outside the cave at the same time.

By the dazzling light of lightning, the two saw a mudslide mixed with rocks, grass and trees rushing down from the top of the canyon.