You must know that the "B1" type test subjects regard the ventilation duct as their nest, and the "B1" type test subjects know more about the environment here than the turtledove or the small worm, and they are not as the turtledove said, they are frightened by the "king spirit" of the turtledove.

The "B1" test subjects naturally did not give up the two pieces of fat that were sent to their mouths easily, they did not retreat, but wanted to completely surround the turtle doves and the insects, and not give them any chance to escape.

The little worm was much more witty than the turtledove, and she could see at a glance the intentions of the "B1" test subject.

"Outflanking the back road?" Turtledove really didn't expect these experiments to be so cunning, "So what should we do now?" ”

"What to do? Of course, I ran away! ”

Anyway, the worm didn't want to compete with the creeper in such a narrow ventilation duct, not to mention that the other party had an absolute advantage in numbers, even if it was about heads-up ability, how could these two people who crawled around in the pipe with their knees and elbows being the opponents of the creeper.

So the tone of the worm is quite categorical.

When the words landed, the insect had already turned around and took the lead in crawling forward according to the original route, and the turtledove's reaction was a little slower, but it quickly caught up with the footsteps of the small worm.

The "B1" test subjects who stayed in place and watched the situation saw the two "prey" in front of them flee without a trace, and the lead "B1" test subjects bared their teeth at the two men behind them.

The two smaller "B1" subjects craned their necks, timidly signaled their submission to the leader, and then walked past the boss, screaming like two great hounds that had been ordered by their masters, to chase the turtledoves and the bugs.

……

The insects crawled very fast, and the turtledove, which was a little behind her, also crawled in the ventilation duct with its head down, but the speed of these two people was obviously not as fast as the "B1" type test subject who drilled in the pipe all day long.

After a very short chase, the turtledove was able to see the "B1" type test subject appear behind him again, he couldn't help but let out an "ouch", and the little insect in front of him also took the time to look back, but only said to the turtledove:

"Look, climb!"

Ikaruga said that he didn't want to climb faster, but the "B1" type test subjects were born to drill pipes, and they were not their opponents at all, in this case, even if they used all their strength to eat, it would be absolutely impossible to get rid of the "B1" type test subjects behind them.

This is what the "B1" subject calls "home field advantage".

However, don't look at the "B1" type test subjects chasing after them tightly, in fact, they did not really force the turtle doves and insects to a dead end, otherwise with the ability of the "B1" type test subjects, they would have already caught up from behind, where would it be like now.

The bugs knew that this was also one of the tricks of the "B1" test subjects, and they wanted to give themselves a front and back attack to maximize the numerical advantage of their side, after all, the ventilation duct was so narrow that no amount of "B1" test subjects could spread out, and if they only attacked from one direction, they would inevitably pay a high price.

Therefore, the leader of the "B1" type test subject led a few subordinates, and the turtle dove and the insect were dotted in the back without delay to ensure that they would not be lost, while the rest of the "B1" test subject took the opportunity to use its ability to move at high speed in the pipe to go around the front of the turtle dove and the small worm to form a trap, which would greatly weaken the turtle dove and the small worm's ability to counterattack when attacked.

The hunting strategy of the "B1" type test subject reminded the two young men in front of them of the wolf pack, those cunning and brutal beasts are the best at this kind of trick, if a wolf pack has a wolf king with a high level of intelligence, then when hunting, they will repeatedly weigh the difference in strength between friend and foe, and make the best choice.

This is why wolves are more feared by humans than other beasts, because there are many beasts in nature that hunt cooperatively, but like wolves, there is only one beast that can use tactics that will surprise even humans.

……

Although the "B1" subject couldn't escape the eyes of the worm, she didn't have much of an effective way to deal with it, but fortunately it was not too far from the point where the ventilation and sewer pipes coincided, and if they could arrive before the "B1" subject was completed and enter the sewer pipe, they would no longer have a home field advantage.

Before confirming the route, the worm had already checked the status of the sewer pipe through the controller, and the place was much more spacious than the ventilation pipe, although it was not spacious enough to run a horse and drive, but at least it could make people stand up.

And that overlap point is also the confluence point of several sewer pipes, and there is a small square-like platform in the middle, so that the staff can stand on the platform and use various tools to clean up the debris around the sewer pipe net.

The underground research institute's sewerage system is complex, and it is also connected to another water purification facility, so that the preliminarily filtered sewer water then flows into the reservoir, where it undergoes more purification processes to finally recycle the water.

A chaotic sound echoed above the worm's head.

The insect's brows were all in one place, and she knew that this movement was nothing else, it was the sound of the "B1" type test subject crawling from above, and it seemed that it would not be long before a large number of "B1" test subjects would be outflanked, and she didn't know if she and the turtle dove would be able to catch up with them.

"Run!"

The turtledove could tell from the tone of the little worm's shouting that the situation was getting more and more critical, and he wanted to climb faster, but this thing was not something he could solve with his subjective initiative, and the narrow and oppressive environment in the ventilation duct was about to drive the turtledove crazy.

The further he crawled, the more cold sweat broke out on the turtledove's body, but he was not very hot, the key was that he was stuffy in his heart, and he felt that he couldn't breathe, and he didn't realize until now that he still had claustrophobia?

Claustrophobia is a typical mental illness that usually seems fine, but once it is in a certain environment, such as the narrow ventilation duct at this moment, especially in the tense situation of being chased and bitten by a group of "B1" type subjects, the turtledove can overcome it at first, but it is no longer able to support it at this time.

"I—I'm dizzy......"

As he crawled, the turtledove suddenly stopped, panting and wiping the sweat from his face, as if he had just been fished out of the water, and his whole body was soaked.