The temperature inside the cave dropped rapidly, reaching a level that normal people simply could not bear. Pen? Interesting? Pavilion wWw. ｂiquge。 ｉｎfo

Under such circumstances, within two minutes, Tang Xiaojun turned into a humanoid popsicle.

However, even so, Tong Xin, who was standing beside him, was still so indifferent and had no intention of rescuing at all.

After a while, Tong Xin suddenly squatted down, squatted in front of Tang Xiaojun, held his calves with both hands, and said softly: "It's going to start again, you have to hold on~"

At the moment when she finished speaking, the gushing cold air suddenly stopped, as if she could control it, but within half a minute, the situation changed again.

Hearing only the sound of "boom", the entrance of the cave began to gush out air currents again, and this air flow, if Tang Xiaojun could still perceive it now, could find that it had turned into hot gas again.

And as the hot air gushed out, the temperature in the cave began to rise sharply, Tang Xiaojun's body changed again, and his body temperature quickly returned to normal, and then it became hot again, once again reaching the limit of what he could bear.

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The hole in the underground is like crazy, spewing hot air for a while, and then spewing cold air that can freeze people, back and forth.

I don't know that after several changes, Tang Xiaojun was like a dead dog at this time, lying motionless on the ground, and what was surprising was that he was still alive.

This is indeed surprising enough, but it can be predicted that if there are no other changes, no matter how tenacious his vitality is, he will not be able to withstand such a toss and will die soon.

On the surface, there is no unusual change in him.

At this point, even Tong Xin felt strange, she squatted beside Tang Xiaojun, tilted her neck slightly, and looked puzzled.

"Why hasn't it appeared yet~" Tong Xin said softly to herself.

She was also a little hesitant at this time, should she stop?

In fact, it was not the first time she had encountered such a cave that spewed hot and cold air currents, on the contrary, it could be said that she frequented such caves.

Speaking of which, this kind of cave is the secret in the hearts of Tong Hefeng and others, and it is also the biggest reason why they are reluctant to leave this mountainous area.

Tong Hefeng and the others have obviously not evolved, but why are their strength so much stronger than ordinary people?

The answer to the question lies inside the cave.

Because, they found that as long as they can withstand several rounds of hot and cold exchange in the hot and cold caves, their strength will become stronger.

However, they also quickly discovered that their power would slowly disappear after a period of time, and that power would only continue to exist after entering the hot and cold caverns again, carrying the hot and cold air currents.

Therefore, they don't want to leave here at all, because as soon as they leave here, they will slowly become ordinary people.

At this point, it's similar to the Blood Essence Stone in Dongjiang City. It's the same with the Blood Essence Stone, after eating it, it can make people evolve and improve your physical fitness, but once you stop eating the Blood Essence Stone, your abilities will slowly disappear.

The most vivid example is Feng Zhengzheng, who has already changed back into an ordinary person.

As for Tong Xin, as one of them, of course, she has also experienced the baptism of hot and cold air, but she is the most special one among their group, her physique is very special and very powerful.

In other words, after experiencing the baptism of heat and cold, the strength she has gained and the ability she has improved will not disappear, and this is what makes her different from others.

In fact, before her Tong Xin appeared, Tong Hefeng was still very dangerous when they experienced the baptism of hot and cold, once the body could not bear it, they would die, even if they did not die, the body was useless, and in the crisis-ridden end times, they would not live long at all.

But since they had Tong Xin, the situation was different, they found that Tong Xin would activate the protective cover, and he was not afraid of the heat or cold air at all, and this protective cover could also protect others.

The key is that Tong Xin can see in time who can't bear it, and who has completed the baptism.

And this is very important, because in this way, Tong Xin can help them in time to ensure their safety. Moreover, the facts have also proved this, since Tong Xin's help, they have never died at the time of baptism.

This is also the reason why Tong Hefeng and they respect Tong Xin very much.

So what does Tong Xin use to judge whether they can carry it?

It's very simple, Tong Xin can see the qi on the person, that is, the protective shield, even if the air shield is very weak, she can see it clearly.

Once a person enters a hot and cold cave, after several hot and cold exchanges, his body will instinctively produce a protective air shield, which is a kind of body protection for itself.

But in general, this kind of protective air hood is very fragile and cannot last long in such a harsh environment.

If the protective cover is broken, then it means that this person has lost his resistance, which is also the basis for Tong Xin's judgment.

And this, except for Tong Xin, no one else can do it.

But the problem now is that Tang Xiaojun didn't produce an air shield at all, or rather, his body was different from ordinary people, and he didn't instinctively release a self-protective air mask like those people.

This is also the reason why Tong Xin is puzzled.

In fact, this kind of air hood is what Tianyou Academy calls internal qi, or in other words, a manifestation of internal qi and external release.

When he was in Tianyou Academy, Tang Xiaojun couldn't produce internal qi after such hard training, and now, naturally, it is not so easy, but he is not far from internal qi.

At this time, extremely drastic changes were taking place inside his body.

Under the threat of survival, the mutated enhancement cells in Tang Xiaojun's body and the living corpse virus actually began to cooperate, working together to resist the invasion of the external environment on the body.

But even so, they still can't really resist, and if he still can't generate internal qi, he won't be able to continue to hold on, and even if Tong Xin goes to save him now, I'm afraid he won't be able to save him, because his body has been damaged too much, and no one can save him except himself.

At this time, it can be said that Tang Xiaojun's body has reached the real limit, and it is also the moment of his life and death.

The two energies in his body were finally forced to completely compromise, and for the sake of their own survival, the mutation enhancement cell and the living corpse virus completely gave up the confrontation and began to cooperate with all their might.

Instinctively, both chose to sacrifice the weaker parts of their cells to make them give up their resistance, and then the remaining stronger cells began to devour rapidly.

The surviving mutated booster cells devour the living corpse viruses that have given up their resistance, and conversely, the living corpse viruses also begin to devour the booster cells.

When they devoured a large amount of energy, they did not choose to divide and reproduce as quickly as before, but prompted them to evolve again, and some of them released a special kind of energy.

This energy is internal qi.