The interlacing of high and low temperatures can produce a physical phenomenon called thermal expansion and contraction, which may cause even metals to expand and deform, or even crack and break.

Zhao Xi knew this common sense in middle school, but unfortunately he returned it to the teacher after graduation, and he didn't remember it until someone hit the ground again.

From a height of tens of meters, Zhao Xi naturally fell into a coma due to the impact of falling to the ground, and when the free consciousness returned to the body, the young man tried to open his heavy eyelids, and the first thing that caught his eye was a huge machine.

Shaped like a thermos, the tank is conservatively estimated to be eight stories high, with several pipes leading to the outside at the top, and is emitting a low, rhythmic roar. Directly in front of it, there is a half-human-tall console with small lights flashing on the dashboard.

"You're awake."

The familiar greeting interrupted Zhao Xi's observation, and the young man turned his head to see the doctor standing by the pillar waving to him, and next to him was Carters, who was sitting paralyzed against the pillar.

Considering that he could only help one person in a hurry, Zhao Xi decisively gave up Frost Star and left it to fend for himself. However, seeing that she was not missing arms or legs now, and there was no blood flowing all over the ground, Zhao Xi speculated that she should have performed the Source Stone technique and did not suffer heavy damage.

From the perspective of the person concerned, he wished that the other party would fall to pieces, after all, he was almost frozen to death a few minutes ago, and it was really difficult to turn the fight into jade silk in an instant.

However, Amiya had an appointment in advance, and the doctor seemed to be interested in containing Frost Star, so Zhao Xi could only restrain his desire to mend the knife, and pretended to be worried: "This guy is fine." ”

"It's hard to say." Putting the stethoscope in his pocket, the skinny man pinched the thermometer-like device and looked through the eyepiece on the visor to examine the values on it.

"This data is probably stage IV..." Reflecting that Zhao Xi is not a medical person, the doctor quickly added: "She is already in the advanced stage of ore disease." ”

Advanced? Recalling the common sense that Lancet-2 had popularized, Zhao Xi immediately realized why his companion had a strange attitude. "In other words, she fell and didn't hurt herself..."

"But I don't have much to live for." Adjusting her position with her hands on the ground, Carters smiled and said in a calm tone as if she was talking about someone else, not her own dying.

"Don't be so pessimistic, White Rabbit." Pulling out the syringe and potion from his pocket, the doctor skillfully sucked the liquid into the syringe, and grabbed Froststar's arm. "Let's get a shot of painkillers first, this thing works great."

On the one hand, like a kind and humorous doctor, on the other hand, like a naughty boy with a little emotion and implicit expectation, the two of them interact like this. The pestle observed beside him for a moment, confirming that Frost Star was not pretending to be weak and had other plans, and Zhao Xi, who felt like a light bulb, left and carefully examined the entire area.

Now where the three of them are, it is the power hub of Longmen, the destination of the snow monster troops in Lin Yuxia's mouth.

The towering machine is constantly running, converting the source stone energy into electricity and heat, which is delivered to every corner of the gantry. Even if there was a trespasser, it still fulfilled its duty and did not slack off for a second.

It is many times larger than the unit that Razer was responsible for, and it is said that he has not been on duty these days, and I don't know if his salary will be deducted. Just as someone is looking up at the machine and letting themselves fly, they hear the doctor calling to themselves.

"Brother, help me call the bunny and ask her to send a few medical operatives."

"Didn't I apply for a walkie-talkie for you?"

"It's broken."

Undoubtedly he nodded, and Zhao Xi operated the contact device embedded in the breathing apparatus, but soon found that he could not help. "Doctor, my device looks like it's broken, too."

"Uh... Then can you find an exit, we will send the white rabbit out first, she needs a full range of medical treatment. ”

Sweeping his gaze over the gate that had been blocked by broken reinforced concrete, Zhao Xi gave a thumbs up and began to search for other entrances and exits; On the other side, the Doctor uses the medical equipment he has at hand to give Carters a simple treatment, ignoring someone's resistance and starting to get close.

"Miss Yelena, you're nineteen years old, aren't you?"

"You are fluent in Yan Chinese, who did you learn from?"

"The combat uniform is quite sexy, and the big bosses of Ursas don't have this kind of aesthetic, you improved it yourself—ouch!?"

"Don't get into any weird places, just be honest and give her a check-up, doctor." Throwing the lighter as ammunition on the other party's head, Zhao Xi circled around the machine and did not find any other entrances and exits.

Considering the importance of the machine, it was a reasonable choice to have only one door for access. After pondering for a moment in front of the ruins piled up into a hill, Zhao Xi looked up at the dark ceiling and sighed helplessly.

Under Wendy's guidance, he has established a connection with the wind elemental, but only to the extent of 'creating a breeze' and 'making himself move a little faster', and walking like a bard and even flying up to call for support is tantamount to a fool's dream for the current Zhao Xi.

"Is her situation dangerous?"

“... Not at the moment. Immediately understanding Zhao Xi's subtext, the doctor shrugged his shoulders and said, "But it's best not to wait for support, with the situation of the white rabbit, it is normal to deteriorate in the next second." ”

"What's more, brother, your back injury has not healed, and it is not appropriate to delay it for a long time."

It wasn't until the other party mentioned it that he remembered that there was an injury on his body, Zhao Xi lowered his head in confusion, only to see a layer of frost condensed near the wound, causing the bleeding and pain to be suppressed. So what is this, is it a blessing in disguise, he pouted speechlessly, and said to his companion that he was in okay condition, and Zhao Xi, who had walked around the room, returned to the same place, and looked thoughtfully at the reinforced concrete blocking the exit.

If you don't want to wait passively, the most feasible solution is to remove the obstacle and open the door from the inside.

Glancing at Froststar, who still looked bad, and the doctor, who didn't seem to be good at manual work, someone could only smile self-deprecatingly, roll up his sleeves and start the work.

After spending a few minutes clearing the passage for passage, the young man squeezed in front of the closed metal gate to make his way through, and unexpectedly found that the situation was more complicated than expected. "Doctor, we're in trouble."

"What, the falling thing broke the switch?"

"If that's the case, it's easier." Turning sideways to make his debut, Zhao Xi explained to his companion who squeezed forward. "The switch seems to be locked, I don't know the password."

The device that controls the door switch is artificially encrypted and cannot be opened unless the correct code is entered. Zhao Xi didn't doubt this, thinking that it was some kind of security measure, but after listening to his explanation, the doctor who operated the device immediately looked solemn, as if he had sensed something.

"Brother, you didn't touch any button by mistake just now."

"Nope."

"Did you find anything unusual when you checked the room just now?"

"Everything is fine except for the hole in the top of our head where we fell - what's wrong?" Noticing the solemnity of the man in the iron mask, Zhao Xi also raised his vigilance.

"Wait a minute, if even the snow monster's whimsical intentions are in 'her' prediction......" Holding his chin with one hand, he muttered to himself, his eyes behind the goggles scanned the room, and finally landed on the still-roaring hub.

"Brother, do me a favor and see if the machine has been tampered with."

“OK。” Hearing this, he rushed to the console, Zhao Xi lowered his head and glanced at the data on the dashboard, and suddenly broke out in a cold sweat.

"CNM, which bastard pulled the power to the full!"