The frisbee carried four people, and finally dodged the whereabouts of the stone pillars, and came to the bright cave at the top of the cave.

I saw that the entire cave had been filled with stone pillars, and these stone pillars had divided the entire cave into many parts.

Not only that, there were still things falling at the entrance of the cave, Shangguan hurriedly put away the flying plate, pulled the three girls, and retreated straight back, and finally a large stone fell, blocking the entrance of the cave.

Now there is no way to go back the way you came, so you can only take this new path.

This is a long and narrow karst cave with a height of more than two meters, and there is a bend two steps forward, and the turn is a long oblique downward cave.

The wall of the cave is smooth and moist all around, and there is moss, not scattered with some phosphorescence, and there is an oil basin hanging on the wall of the cave after a dozen steps.

"It seems that we can only go this way." Senna said.

"That's all it takes, let's go, everyone must be careful." Shangguan said that he would walk in front and lead the girls forward. Come to an oil basin and set it on fire, and the hole will instantly light up a lot.

All the way forward, although there is phosphorescence, brazier, and tactical flashlight, the 7,000-meter-deep underground cave still looks very dim.

The four of them also walked very tightly, Zhao still and Li Zhenai did not have a good relationship, but by helping each other just now, the relationship obviously improved. At this moment, the two leaned together, looking a little scared.

Sena and Shangguan Yu walked together, and Sena was in it, the oldest and most experienced, so it was very suitable to be Shangguan Yu's assistant. It's a pity that Shangguan Yu and her don't call, after all, the difference between the two is seven years old.

Sena is really like a big sister, caring for these two little sisters everywhere, looking at the two of them and saying, "There's nothing to be afraid of, in the face of thousands of zombies, you two delicate girls, I don't see that I'm afraid." ”

Zhao still said: "That's different, I really have to face the monster, I know where it is, but I'm not afraid, and I don't know where it is at all, so I'm afraid." ”

Shangguan Yu turned around and said, "So everyone should be extra careful, protect yourself, and always check the use of the shield, understand?" ”

This narrow hole went all the way down, and there were turns, and after walking for almost ten minutes, before it reached the end, Li Zhenai, who had been silent for a long time, complained: "Why hasn't it reached the end yet?" ”

Shangguan Yu suddenly stood up and said, "Is it ten minutes?" ”

"What ten minutes?" Li Zhenai asked.

This time, Shangguan Yu spoke English, and most of the time he still had to speak English, which was to take care that Li Zhenai did not understand Chinese.

Shangguan Yu replied, "It's been ten minutes since we left the Great Cave, right?" The displacement is about to start again. ”

Sure enough, I heard a commotion coming from all directions, and Shangguan Yu said, "Be careful, the displacement has begun." ”

All four of them stopped moving on, looking nervously around, the sound of the stones moving kept ringing, but there was no change in the hole.

The sound of displacement soon stopped, and the world was quiet again.

"Maybe it's not involved in displacement, and it's not suitable for displacement," Senna said. ”

"That's how it should be, let's move on." Shangguan Yu said and walked ahead and continued to walk.

After walking for a while, I turned a corner and finally came to the end of the cave, and this end was a bit depressing, because there was a pool in front of everyone's eyes, and then there was no other way out.

Senna scolded, "Shit, where are you going to go with this shit?" ”

Shangguan Yu first lit up the three oil basins on the cave wall, illuminating the place, and there was a sloping road leading to the pool. Looking around, there is indeed no other way out, and if you go back the way you came, you will inevitably return to the entrance of the cave at the beginning.

And the entrance to the Great Cave has been blocked by boulders at the moment.

There is no way out at either end, so what is the next step? Shangguan Yu circled around the pool, trying to find the answer, but after only half a circle, he probably thought of something.

Turn on the individual computer, check the temperature, the thermometer shows that the air temperature in the cave is -19 °C at the moment, which is much warmer than outside, but it is still very cold.

At this moment, it is the Antarctic on the polar night, and the temperature on the ground is minus 60 or 70 degrees, while the temperature under the ground at a depth of 7,000 meters is much higher, and it is also minus 30 degrees.

Now in this cave, the temperature is much higher, but -19°C, which is still very, very cold.

Sena walked over and saw Shangguan Yu looking at the temperature, so she asked, "Did you think of anything?" ”

Shangguan Yu sneered and said, "I just thought about it, and I don't know if it will work." ”

With that, he turned off his computer and began to unload his weapons and equipment, and then began to undress.

"Brother Yu, what are you doing?" Zhao still asked in surprise.

Senna asked, "Are you going to dive?" ”

Shangguan Yu pointed to the slope leading to the underwater, continued to undress, and said: "The road above is blocked, and this downhill is obviously the way out, but it is flooded, so I guess the exit may be underwater." Wait for me, and I'll go down and see. ”

"Huh?" Zhao still had a very embarrassed expression, "Wouldn't that mean you have to dive?" ”

"It's okay girl," Senna comforted her, "it's a little cold to stay in the meeting, and I'll live and warm up after I go out." ”

"But what if I can't swim?" Zhao still stomped his feet anxiously.

Shangguan Yu had already stripped off his clothes and shoes and socks, wearing only a pair of shorts, revealing his strong muscles, taking a deep breath, and getting into the water.

After Shangguan Yu dived into the water, he found that this pool was not deep, about three or four meters, and there was also a nearly square pool below, and there was a square hole two meters square on one side of the pool, so he swam over.

Swimming through this square hole, he found that there was a very long hole in front of him, so he continued to swim forward, only about thirty seconds, he surfaced, and found that the water surface was only less than one meter away from the top of the cave, and the next cave went all the way down like this, that is to say, as long as the diving swam past the thirty seconds, you can surface and continue to swim, and although the space here is narrow, but the air is quite fresh.

In order to make sure that the road behind him was safe, Shangguan Yu swam all the way down, and after about three minutes of swimming, he came to another cave, and this new cave had several exits.

Since this is the case, it shows that the underground river cave that Shangguan Yu swam over is the only way out.

He didn't care about the cold, so he swam back the way he came.