Chapter 125: [Chapter 125: Subcritical]

"It doesn't matter; you should consider keeping me."

Ding Junyi's expression remained calm. She pointed to a workbench in the distance, where several exquisite petri dishes sat. These were the plant seeds Lin Xian and kiki had brought back from the 89th floor, and it appeared Ding Junyi had already finished sorting and packaging them.

"Your plan is to cultivate green plants on the train, and I happen to be an expert in this field. Although biological academic research and plant cultivation are essentially the difference between theory and practice, there should be no one on this train more suitable than me to carry out your plan. Moreover, you possess two Keer-3 biological science research cabins, which can be used separately—one as a research studio for me and the other as a cultivation carriage. I have already made some progress in the research of the Blood Calamity plants. Coupled with the fact that there is more than one esper on this train who can assist with experimental observation, keeping me will help you explore more fields."

Lin Xian looked at her curiously. "As far as I know, there is a team from your Dawn Project in Yubei City. There might even be people from the Phoenix Society and the Iron Guard Brigade there. You could easily join an official organization with your status; why do you keep wanting to get on my train?"

Ding Junyi tilted her head slightly and looked at Lin Xian earnestly. "I remember telling you last night."

"What?"

"I enjoy higher-level physiological pleasure. Staying in the underground city makes my emotions repressed. Besides, the underground city isn't safe either, is it? Hasn't the fact proven that?"

Lin Xian found it truly hard to understand. He frowned and said, "Are you saying you've developed a liking for the thrill of fleeing?"

"That possibility cannot be entirely ruled out." Ding Junyi said righteously, "Welcoming death on a speeding train heading toward dawn is more romantic than science. Besides, I can have both science and romance at the same time."

So, such a rigid and pedantic female academic actually had such crazy thoughts. Lin Xian clicked his tongue in secret. No wonder many people said that those who appeared calm on the surface possessed true fanaticism in their hearts. From this Director Ding, Lin Xian had finally seen a glimpse of it.

"Fine." Lin Xian took a deep breath and replied, "If you still have this thought after Yubei City, I will agree to let you on the train."

"Thank you."

Ding Junyi looked at him, turned around, and continued to work earnestly.

Lin Xian walked toward the rear carriage, preparing to wake up Gao Ta to get the armor for the nuclear-powered locomotive sorted out first.

At this moment, the light screen before his eyes flashed, and the R&D Center sent a reminder.

【Blue Sky kk-93 Reverse Osmosis Water Purifier blueprint upgrade research successful, please acquire the new blueprint】

Lin Xian's face lit up with joy, and he immediately chose to acquire it.

With a flash of light, a brand-new blueprint appeared in the R&D Center.

【Congratulations, you have obtained the A1-level Subcritical Reverse Osmosis Water Purifier (Blueprint)】

"Subcritical reverse osmosis water purifier?"

Lin Xian looked at the strange blueprint and was momentarily dumbfounded. "What is subcritical reverse osmosis? Is this still the technology tree of this world?"

Halfway there, he stopped in his tracks. He immediately turned back and found kiki.

"Hey, kid, let me ask you something. Do you know the term 'subcritical reverse osmosis'?"

"You've got me there..." kiki frowned. "What is that? Something related to a water purifier?"

Lin Xian found Ding Junyi again.

"Director Ding, do you know about subcritical reverse osmosis water purification technology?"

Ding Junyi turned around and pushed up her glasses. "RO reverse osmosis method—if you are referring to water purification equipment that relies on a reverse osmosis membrane to separate solvents from solutes in a solution under pressure, and achieves a filtration precision of 0.0001 microns, many laboratories or living areas with high requirements for water quality use this water purification technology to obtain pure water."

"And the 'subcritical' you mentioned should refer to the state conditions of the substance. In engineering, it refers to substances that exist in a fluid form where the temperature is higher than its boiling point but lower than the critical temperature, and the pressure is lower than its critical pressure..."

Before she could finish speaking, Lin Xian left directly. Ding Junyi glanced at him, then turned back expressionlessly to continue working.

"Maybe I'm overthinking it. This is just a high-end water purification technology; it's just that many people haven't heard of it."

Lin Xian thought for a moment, then suddenly put the blueprint into the R&D Center to see if there was an end to this research upgrade.

But after he put the blueprint in, the R&D Center directly prompted him: 【Mechanical manufacturing level insufficient, has reached the highest standard for this blueprint】 "Alright then..."

At this time, he opened the preparation factory. His decomposition space had already acquired a lot of high-energy solid gunpowder, and now that he wanted to make this water purifier first, he needed the basic materials for the reverse osmosis membrane.

Lin Xian tried to use steel and plastic for conversion, only to find that this reverse osmosis membrane material belonged to Level 2 material. Using Level 1 material for conversion increased the requirements for conversion materials several times over!

"Damn, that's really not cost-effective."

Fortunately, he had quite a bit of Level 2 material now, and the material required for this reverse osmosis membrane wasn't much. So, he directly used carbon steel for conversion. After about 20 minutes, he finally succeeded in preparing it.

Lin Xian took a deep breath. A manufacturing shimmer appeared in his hands, and countless materials flew out to assemble in the air.

Soon, a white water purification device was slowly manufactured. It was a set of equipment composed of multiple white round pipes and some kind of pressurizing device.

"Good guy, it looks very high-end."

"Let's try it first."

Lin Xian was eager. He immediately took this water purification device to Carriage No. 1, connected it to the locomotive's water tank, and started it after turning on the power.

The machine made almost no sound. After waiting for a few seconds, a stream of clear, purified water flowed out.

"It looks..."

!

Looks like crap.

How could his mere naked eyes see the existence of microorganisms?

Lin Xian took the water directly to the Laboratory Carriage No. 3 and found Ding Junyi again.

"The laboratory has a water quality tester, right? Help me test the quality of this water."

Ding Junyi had no questions. Upon hearing Lin Xian's words, she stood up, took Lin Xian's water, and started testing it with the water quality tester. She soon reached a conclusion.

"If you want to test water quality, there are many requirements: particles, turbidity, organic matter, pH, etc. However, I know you are asking about the standard for drinking water. In conclusion, this water quality belongs to an extremely high drinking standard. But I don't have effective testing equipment for the energy carrier of the dark night infection here. Perhaps the Phoenix Society or the headquarters already has progress, but this is not the field I study."

Lin Xian took the water, hesitated for a moment, and then drank it all in one gulp.

The filtration standard of this water purification device of his had already exceeded the standard of the bottled pure water stored on the train. If there were any other invisible infectious influences, there was no other way.

However, so many people on the train had been drinking bottled water, and there were no problems so far.

Another point was that the Isomorphic Rubik's Cube helped him isolate the influence of the dark side of the night on the train. Thinking about it this way, he guessed that the drinking water problem should be guaranteed.

If even this couldn't be guaranteed, it would be hard to imagine how other fleets could survive.

Relaxing his heart slightly, Lin Xian chose to put the blueprint of the M556 light machine gun into the R&D Center.

【Please select the R&D direction for this weapon:】

【Firepower】 (13 hours)

【Mobility】 (09 hours)

【Precision】 (12 hours)

"Firepower!"

Lin Xian responded in his heart, familiar with the process.

Immediately, a line of prompts appeared on the light screen: 【M556 Light Machine Gun】 Firepower upgrade (12:59:59), countdown started.

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(End of chapter)