The team members discussed the stele for a long time, and finally decided to use a safety rope to form a rope snake to connect all the team members, which is also a common method used by mountaineering teams to face severe terrain and weather.

There are pros and cons to this approach, the advantage is that connecting everyone together can fully take care of the safety of each player, unless there are multiple players sliding at a time, otherwise the whole team is stable, and the disadvantages are also obvious, it is easy to drag teammates into the water, and it is not flexible enough in case of accidents.

However, with the quality of the scientific expedition team, there will almost never be a sudden pig teammate situation to hold the whole team down, so it can be said that for a well-trained professional team, this chain tactic that looks a bit silly at first glance is still more practical.

But the point is that they still have thousands of meat-eating mouths on top of their heads!

Just now they were fire hedgehogs with burning sticks, and now they are bound to become a string of roasted sausages with tender skin and oil filling, and it is hard to guarantee that they will not want you to take a bite of me, you taste it and I will lick it.

The question of how many bites a large living person can gnaw clean.

The strongest in the team are naturally the three warriors, followed by the two special forces of Changsha Mo Daonan, although Tashi is a student of Professor Zhang, his own quality is comparable to half of the special forces, although Professor Zhang is the age ceiling of the team, but he is old and strong, not under the ordinary soldiers, the weakest are the military doctors Mao Jingqin and Zeng Tai.

Therefore, the three warriors took care of each other at the head, middle and tail of the team, Captain Jiang volunteered to act as the snake head of the 'One Word Long Snake Formation' to open the way first, Master Yaxi was in the middle, Professor Zhang and Zeng Tai were sandwiched between the two, and Tang Chunjiao was at the end, taking care of Mao Jingqin.

The team members put on their climbing equipment and carefully moved forward against the stone wall, and after walking less than 100 steps, they found that the stone steps in front of them were movable, and the countless stone steps in front of them would elongate or retract into the stone wall.

Captain Jiang just hesitated, and Professor Zhang's voice came from behind: "Step on the short one." ”

Captain Jiang saw that there was indeed a stone step about two meters long stretching out of the cliff in front of him, and there was indeed a stone step that was only as long as two bricks, compared to the former, he could step on it as soon as he raised his foot, it was really a small span and large, in contrast, it was like a barricade born horizontally, according to ordinary ideas, he would never be reluctant to make it difficult, but he believed in Professor Zhang's judgment, and took a big step over the long stone steps, and just stepped on it, the road ahead changed for a while, and a batch of stone steps grew out and a batch of stone steps retracted.

Professor Zhang explained: "The Nine Palaces are the way. The change of this suspended plank road is also arranged according to the principle of nine palace gossip, if you are greedy for convenience and walk indiscriminately, you will soon fall into the dilemma of having no way out, everyone pays attention to their feet, and must follow the footsteps of the previous person. ”

Next, the team followed Professor Zhang's instructions to take a step and stop a step, and the changes of the stone steps in front became more and more complicated, from a complete plank road to a cliff wall full of stone nails, everyone stepped on the stone steps up and down, the interval was close at hand, or several zhang away, but Professor Zhang can always find the correct foothold, sometimes it seems that there is no way ahead when there is always a miraculous growth of a road, so in an alternative maze full of roads out of a road, the team members admired Professor Zhang's knowledge to the ground。

At this moment, there was a huge sound of wind overhead, but in this unfathomable underground valley, how could there be a sound of wind? This is as if it is more like the sound of thousands of wings flapping in unison!

The most feared thing of the team members still happened, the guns immediately had to fire for self-defense, Professor Zhang stopped: "Wait, using guns will make the bat swarm more frantic and the situation worse, and they don't seem to be coming at us." ”

Captain Jiang quickly took out a small ball from his body, and after activating it, the ball shook imperceptibly, but everyone didn't hear any sound.

Chang Sha and Mo Daonan only woke up at this time, and quickly took out two identical balls, which were the new equipment distributed on this scientific expedition, a small instrument that could emit special ultrasound, enough to scare off most small insects and bats that mainly rely on hearing to survive.

The effect was good, and the bats were far away from the expedition team, as if there was an invisible barrier in front of them.

The team members, especially the two girls, breathed a sigh of relief, and then everyone noticed that the bats were flying mightily towards the dark river under the cliff, and then they realized that they had unconsciously climbed to an extremely high place, and the dark river at their feet was hundreds of meters away from them.

"What are they going to do?" asked Tang Chunjiao.

"Predation!" Professor Zhang said.

Predation?

Tang Chunjiao was puzzled in her heart, generally bats are nocturnal, inhabiting the dark part of the cave during the day, and going out to hunt when dusk is approaching, but although it has been a few hours since we entered this underground palace, it has not reached dusk.

"They don't go out to hunt, they hunt in the underground river, this underground world has a complete food chain, no, it's an ecosystem! It's almost undisturbed by the above-ground world!" Professor Zhang said directly.

"Here, how many fish can there be in this river...... Tang Chunjiao shut up before she finished speaking, because she saw that thousands of fish on the surface of the river illuminated by the searchlight crowded the entire river, head to head and tail to tail, and a huge underground river was like a big pot flowing with fish soup and then overflowing the soup, not to mention bats, people were inexplicably appetizing.

Countless bats are like predatory ospreys taking turns to skim the water, and they rise quickly with a single tap, and their huge and sharp hind feet have caught a fish, and if it is a larger fish, several bats will work together to dismember and tear it into several pieces in an instant, and the bloody breath stimulates the bat group to be more bloodthirsty and ferocious.

"This ...... They're ...... Captain Jiang said uncertainly, the scene in front of him is indeed very similar to the salmon school that migrates back to its birthplace in order to breed the anadromous river, Captain Jiang has seen the wonder of salmon migration when he went to the northeast to perform a mission before, and he still remembers it vividly.

"Breeding season happened to coincide with us? And if a school of fish of this size were a once-in-a-year event, it wouldn't be able to support such a huge swarm of bats. Professor Zhang said in an uncertain tone, although he is not an expert in zoology, he also knows that bats are not the Nile crocodiles of the Mara River, they are one of the fastest metabolized mammals, and it is impossible to eat a full meal for half a year.

At this moment, a black shadow under the water, which is enough to overshadow any horror movie character, suddenly bursts out from under the water, opens its terrifying mouth, bites three or four bats at a time, and quickly dives back into the water.

The expedition team was very quiet, the men did not roar, the girls did not scream, it seemed that the flashing phantom did not exist at all, but if anyone came closer, they would find that this professional team that had experienced a hundred battles and created countless traps, including several warriors, was already colorless at this moment.

"Did you see it just now?" Zeng Tai patted his teammates beside him with some uncertainty, observing Chang Sha, who was the most keen.

Chang Sha muttered: "It turns out that there are really aliens in this world." ”

"It should be an amphibian reptile species, which has degraded its eyes after a long period of dark environment and evolved its carapace, well, in short, this is undoubtedly a completely new species, this is a great scientific discovery. Professor Zhang explained with some urgency, he urgently needed the power of science to clear his mind, but he was not an authority in the field of zoology, so his explanation was a little vague, and the scene was a little embarrassing for a while.

"Professor, the fish seem to have been driven by the aliens. Mao Jingqin opened her mouth to save Professor Zhang from the embarrassing situation and saved the team's self-esteem, which was quite fragile in the ceiling of knowledge.

"Yes, yes, yes!" Professor Zhang was empowered, glancing at the bright female doctor.

"Schools of fish are driven into narrow channels by these creatures from a larger body of water, just like a pod of killer whales hunting seals, pods of dolphins hunting tuna, this is a means of hunting, and their targets are not only fish, but also a swarm of bats that fly down from the sky to prey on fish, killing two birds with one stone, these creatures have a high level of intelligence, whether it is this teamwork skill or the ability to hunt across two ecological niches is extremely rare in amphibians and reptiles. However, the fact that so many schools of fish have been driven into this river is enough to show how huge their original habitat must be, and it is rumored that it is not impossible to have a sea beneath the Tibetan land, and the mysteries of the world are really inexhaustible. ”

The more Professor Zhang spoke, the more fluent he became, and he quickly regained the confidence that the team's knowledge ceiling should have.

"All I know is that if any of us fall into this river, it will be very bad. Zeng Tai didn't say "the teacher is smart" this time, and directly summarized the current priority.

Taking advantage of the chaos of snatching food and being eaten below, the scientific expedition team accelerated and wanted to pass this section of the suspended road as soon as possible, and after walking for a while, it gradually could no longer hear the sparse flapping of the wings of bats, and the feet were getting farther and farther away from the river, and in the end they could no longer see or hear anything, only the infinite darkness of the abyss under their feet.

Captain Jiang stopped suddenly, and Professor Zhang was just about to ask what was wrong, but he had already seen something under the searchlight.

It was a person, a relatively complete corpse to be exact, different from the bloody skull, a rather complete one-piece suit with a helmet, very complete, not counting the lower half of its disappearance.

Half of the bones hung on a stone step born on the cliff wall, and through the skull eye hole in the helmet, you could see that something was gnawing inside, and it flew out of it by a strong light, and the bulletproof and poison-proof combat uniform finally failed to save the entire body of the owner.

After the previous visual test, this time the team members were much more acceptable, Captain Jiang moved the searchlight up and down, and found a few hanging corpses, among which it was estimated that the original owner just now, the closest to them was hanging not far from the head, and the eye hole in the helmet was silently watching them.