Zheng Guo knocked off a piece of ice with a stick and threw it under the cliff, while he began to count in his heart, trying to deduce the depth.

It was only about a second and a half before I heard the sound of crashing and cracking from below.

The falling time is one and a half seconds, and according to the formula, substituting the gravitational acceleration on the planet, the depth is estimated to be about ten meters.

Much shallower than expected. This is a bit strange, you must know that when the bun was shot down just now, it was bottomless, could it be that the lens was malfunctioning?

Zheng Guo asked the bun to shoot down again, and the result was the same as last time, like a bottomless pit.

"You're broken." Zheng Guo uses consciousness to communicate with buns.

"Nope." Baozi replied, "It's an illusion caused by infrared refraction." The principle of this night vision lens is a combination of infrared and low-light imaging, which mainly uses low-light imaging in low-light environments, and mainly uses infrared imaging in this completely dark environment. First, the lens emits infrared rays, encounters an obstacle, and then reflects back to create an image. However, due to the special terrain below, the light is refracted specifically......"

Zheng Guo didn't understand much, it seemed to have something to do with the refractive index and shape of the ice cube.

Although he listened vaguely, he still made up his mind a little.

Ten meters is three stories high, and it is not an insurmountable obstacle.

To be on the safe side, Zheng Guo knocked down another piece of ice and threw it, this time with more force, throwing it farther than the first time.

It was also expected that there was a sound of collision and cracking almost a second and a half later.

However, the next development was a bit unexpected for him.

When the sound of the ice cracking, it did not die down, but then there was a grinding sound, as if the ice had fallen and then slid forward for some distance.

There seems to be a ramp as well.

Throw another piece.

Still the same result, first down after sliding.

After throwing it a few times in succession, Zheng Guo roughly sketched the following terrain in his mind: first, it went down vertically for almost ten meters, and there was a flat land with a width of about five or six meters below, and a ramp was connected at the end of the flat land.

This should be what Baozi calls "special terrain".

Of course, this is only an ideal model, and many details cannot be imagined alone.

Judging by the duration of the sound of the ice sliding, the slope is relatively long, but the slope is not too steep, so it should not be an insurmountable obstacle.

Zheng Guo took out the rope from his backpack, tied a knot at one end, stuffed it into a crack in the ice, stuck it tightly, and told the camera his plan.

After hearing this, the sailors felt that this was too risky, and they only knew a rough idea, so they went down rashly, which was like walking a tightrope with their eyes closed, and a misstep turned into a thousand years of hatred.

What to do if the rope comes loose? What if the bottom of the cliff is covered with ice spikes? What if there's a frost dragon sleeping underneath? What if it's a cultivator's cave below?

There may be too many risk factors.

"I still think it's more reliable to go back and wait for rescue."

"It's uncomfortable not to waste a day."

"Big brother, are you suicidal? (O_O)”

"Is it PTSD? ⊙ω⊙”

"Thinking too much, Guoguo just likes shows. ㄟ(▔，▔)ㄏ”

"It's the first day you've watched Guoye's live broadcast, right?"

"Old fans said they were used to it."

"If you go back and wait for rescue, he won't be Zheng Guo."

……

Zheng Guo enjoys adventure, but he is not the type to joke with his life, but a rational adventurous. Some sailors think that he is a "wave", but in fact, they don't know that Zheng Guo is a prepared wave, and he will do it with at least 80% or 90% certainty.

Every time he stepped into danger, Zheng Guo had to understand his surroundings and prepare at least one backup plan accordingly. This is his iron rule.

Therefore, before rappelling this time, he also had to figure out the following specific details, so as not to be penetrated by the ice spikes that suddenly appeared in the process.

So Baozi once again played the role of a scout and rappelled down the cliff. The virtual screen remained in front of Zheng Guo and served as his eyeliner.

Zheng Guo will not do this unless he has to.

The reason is simple, if you find out the way ahead in advance, it's like being spoiled, and the next adventure will be a lot less fun. After all, the essence of exploration is to explore and discover the unknown, and the focus is on personal experience, rather than using black technology equipment to reduce the difficulty.

Zheng Guo had already used the throwing method to depict the general terrain at the bottom of the cliff, but this was not enough, it was too rough, and he needed more detailed information.

According to the picture sent back by the bun, the terrain at the bottom of the cliff is just as he guessed.

There weren't too many obstacles on the flat ground at the bottom, and there were a few ice picks in the corners on either side, some distance from the middle, so as long as he wasn't swinging during the rappelling, he shouldn't be poked.

There is also nothing noteworthy on the ice wall.

The middle is convex, presenting""-shaped, relatively smooth.

"It's not a big problem." Zheng Guo tugged on the rope to make sure it was strong enough, turned around, and looked at the spotted bear not far away.

"Brother Xiong, I can't take you down, ask for more blessings."

Zheng Guo said to it guiltily, threw down the backpack and stick first, and then began to rappel.

The Spotted Bear King walked to the edge of the cliff and looked at him, his pupils glinting.

It licked its two forepaws unhurriedly and shook its head again, as if it was doing something to prepare for something.

However, Zheng Guo didn't notice this, he was concentrating on the rope drop.

Because there were not too many obstacles, it landed quickly.

Zheng Guo stood firm, breathed a sigh of relief, picked up the backpack and stick, listened sideways for a while, and said, "The water source should be not far ahead, and it is likely to be at the end of the ramp." ”

It's close at hand, but it's not in a hurry. This ramp is not too steep, but it needs to be treated with caution. You can't slide straight down like a slide, the hell knows what's underneath.

"Regardless of Master Xiong⊙ ω ⊙"

"Yes, Master Xiong is still on it."

"Just abandoned......"

……

"Do you have a way to get it down? I can't help it anyway......"

Zheng Guo looked at the night vision picture and spread his hands helplessly.

The voice stopped abruptly, and his pupils contracted suddenly.

He saw a huge body suddenly fall from the top of the cliff, as if a boulder had fallen from the sky.

Rumble!!

Click!

The figure suddenly fell not far from him, and the entire ice cave trembled, and the ice under his feet cracked.

After the bear king landed, he didn't do anything, just raised his paw and licked it, and stepped on the ground to break the ice ballast and walked towards Zheng Guo.

Zheng Guo never expected that the dead fat man would jump down directly!

How much it weighs, it is no less powerful than a small bomb in free fall from a height of ten meters.

After a few seconds of silence, the power of the "bomb" was finally revealed, and there was a screeching sound overhead, as the old ice was cracking and collapsing.

Click!!

Bang!!

Wow!!

A huge block of ice fell on Zheng Guo's right side, shattering, and countless pieces of ice flew towards Zheng Guo like a hidden weapon.

Zheng Guo hurriedly turned his back, put on a hood, and protected his head.

After the ice fell, not only did it not end, but the movement became even louder, like an earthquake, trembling and roaring.

This place is going to collapse!

Zheng Guo didn't have time to think about it, and rushed towards the ramp.

As soon as he left, he was hit by a huge piece of ice.

At the moment of life and death, he didn't care about thinking about what was under the ramp, and if he didn't leave, he would be stoned to death here, so it was better to gamble.

Zheng Guo was about to jump up the steep slope when he suddenly heard the bear-like figure also follow and arrive before him.

Zheng Guo's heart moved, and he used his sense of hearing to discern the current position of the bear king, and he jumped into the light skill, jumped on its back accurately, and immediately grabbed the fur.

At the same time, the bear king roared and carried Zheng Guo down the ramp.