The last human in the universe

Chapter 20 Marriage
Zhao Changxing once again returned to the Huozhi spacecraft as quickly as possible, and saw the waveform of this signal with his own eyes.

"During this time, in the direction of Cygnus, have you observed any noteworthy natural phenomena?"

As soon as this question was asked, Zhao Changxing subconsciously shook his head.

If there is, Xiaoxi will definitely report to herself.

Sure enough, Xiao Xi said, "No."

This is also a radio wave signal that seems to have certain rules.Moreover, Xiao Xi also couldn't decipher the information from it - if it really carried some information.

Also because the sample size is too small.

But from the same direction, two consecutive signals that seemed to have some "intelligence" characteristics were received, which in itself was enough to make Zhao Changxing have some bad associations.

"Continue to observe." Zhao Changxing made another decision: "Also, from now on, all our communications will be carried out at the lowest power."

"Good captain."

It's a sort of "radio silence".

Zhao Changxing is consciously hiding himself.Although he didn't know if it was useful or meaningful to do so.

Under the sense of crisis and urgency, Zhao Changxing once again devoted himself to the construction of the base.

The boys and girls at this moment only have the theoretical experience learned from textbooks and classrooms.There is almost no practical experience, and Zhao Changxing's teaching is still needed.After almost another year, the young men and women can really get started with the work on the Tinder spacecraft, the human base No. [-], and various industrialization promotions, and they can start working independently.

Maybe it's because they are getting older and people are becoming more mature, so the more they can understand the difficulty of the current stage of human civilization, the teenagers have grown up rapidly and have truly become Zhao Changxing's right-hand man.

Under such circumstances, in the industrial zone, the equipment for mechanical casting and metal processing was completed several times faster than before.Then the focus of work was adjusted again, from metal smelting, processing, and casting to chemistry and chemical engineering.

Chemical raw materials that are indispensable in various industrialization processes, such as various acids, alkalis, salts, various oxides, various hydrocarbons, aliphatic hydrocarbons, aromatic hydrocarbons, alicyclic hydrocarbons, or similar methanol, ethanol, formaldehyde, Acetone, vinyl chloride, etc., scientists on the earth have already developed artificial synthesis routes using materials already on Sedna as raw materials. In the laboratory, if manual and customized methods are adopted, Zhao Changxing is completely capable Ability to self-synthesize any desired chemical raw material.

But the key problem is that this synthetic method is too inefficient.Only industrialization and scale can produce enough chemical raw materials, and finally produce building materials that can be used to build new planting bases.

Now, what Zhao Changxing hopes to build is a sulfuric acid production line.Sulfuric acid is called the mother of chemical industry, and it is an indispensable part in the manufacture of many chemical materials.At this moment, the production line planned by Zhao Changxing has an annual output of 5 tons of sulfuric acid, and the daily output is about...less than 14 kg.

This output, placed on the earth with a complete range of industries and has already achieved scale, may be laughed out of the mouth.But on Sedna, if this production line can be built, it will definitely be a remarkable achievement.

This production line, Zhao Changxing intends to use the so-called "wet sulfuric acid method" process to build.Of course, what is used here is optimized by geoscientists, but the basic principle is still the same.

First, burn sulfur to obtain sulfur dioxide, add catalyst vanadium pentoxide, oxidize it to sulfur trioxide again, and then hydrate it to produce sulfuric acid.

As for the sulfur element, there was a large amount of it in the veins where Zhao Changxing collected iron ore before—it was a pyrite, and the so-called pyrite was actually ferrous disulfide.After it is smelted and purified, the iron is used to smelt steel, and the sulfur is used to synthesize sulfuric acid.

With sulfuric acid as a raw material, Zhao Changxing can start to manufacture an ethylene production line to produce ethylene.With ethylene, subsequent synthetic fibers, synthetic rubber, plastics, and even a series of raw materials such as vinyl chloride, styrene, ethylene oxide, and acetic acid can be produced.

Leading the two young men who served as helpers, Zhao Changxing buried himself in the work.

Today, two friends, Qian Yue and Chen Feng, are on duty in the industrial zone.Perhaps because of growing up, Qian Yue's personality became a little more introverted, and Chen Feng was no longer introverted, but began to become calm.But I can vaguely see the shadow of my childhood.

There seems to be something wrong with the mood of the two today.Zhao Changxing keenly noticed that the two of them seemed to be peeking at each other from time to time at work.And once the eyes of both parties come into contact, they will move away instantly like an electric shock.

"There is a story between these two little guys..."

Zhao Changxing looked at the time, and it happened to be time for a break, so he announced a break, and then deliberately left here, leaving space for the two of them to be alone.After a while, when Zhao Changxing came back, he saw that both of them had uncontrollable smiles on their faces, as if they were in a very happy mood.

Zhao Changxing watched his words and actions, pretending that he didn't know anything.

The days passed slowly in this situation.After several months, the sulfuric acid production line was finally completed, and after a while, the ethylene production line was also completed.For the sake of safety, Zhao Changxing temporarily moved the two production lines to an independent building next to the main building of the No. [-] base, which is connected to the main base through a passage.

In the future, these chemical plants will obviously have independent locations, but now they can only make do with it.

After initially solving the production of sulfuric acid and ethylene, Zhao Changxing has more development directions in the future, and can construct at least thousands of factories that produce different products.But Zhao Changxing cut them all off.

At the current stage, Zhao Changxing's goal is very clear, that is, to produce whatever materials are needed for the construction of the new planting base, and everything else will be discussed later.

The sky and the earth are big, and eating is the biggest problem.If people starve to death, no matter how many talents they have, they will not be able to display them.

What is currently going on is the synthetic rubber, fiber, and plastic production lines.The gaskets needed to build new planting bases, the insulation and heat insulation layers of cables, etc., all need this production line to produce.

With the improvement and increase of the types of production lines, the demand for basic materials is also increasing.Based on this, the Red Flag space vehicle had to run around on the land of Star Sedna all day long, transporting carloads of ores in.Except for the two people who were driving the space vehicle and the two people who stayed behind in the Pyrotechnic spaceship, the remaining six people plus Zhao Changxing were also busy all day long, and it was rare to have time to rest.

The process of the rubber production line is much more complicated than that of the previous basic material production lines, and even some parts cannot be produced by the existing metal processing technology, so they have to rely on 3D printers to customize them manually.This also took a lot of time. It took Zhao Changxing and others more than three years to complete it.

At this time, the children of the second generation were already ten years old.The first generation of teenagers are already 23 years old.Zhao Changxing's age has reached 51 years old.

During this period of time, Xiaoxi received the signal with special characteristics twice from the direction of Cygnus.But so far, Zhao Changxing has not found anything else.So there's not much he can do other than keep watching.

Today, in order to celebrate the completion of the rubber production line, Zhao Changxing specially took [-] catties of mutton, and a lot of vegetables, mushrooms, sesame paste, etc., and brought everyone back to the Tinder spacecraft, preparing to have a meal of the children's favorite hot pot. Celebrate.

Zhao Changxing and ten children of the first generation sat at a table with a total of 11 people. The 30 children of the second generation were divided into 3 tables, a total of 4 tables. The mutton and vegetables were divided, and a group of people ate lively up.

At this moment, Zhao Changxing has the feeling that three generations live under one roof, and he also has a sense of accomplishment in his heart.Because he clearly knew that almost all these children could be said to have been brought up by himself.

The dinner was enjoyable, and when it was almost halfway through, Qian Yue and Chen Feng looked at each other, and finally, Chen Feng said to Zhao Changxing a little shyly: "Dad, there is something..."

"Oh? You said."

The children of the first and second generations, regardless of their age, were quiet.

"I, I..." Chen Feng hesitated to speak, his face was flushed, and he couldn't speak.Qian Yue looked impatient, so she stood up and said, "Dad, Chen Feng and I are going to get married."

"marry?"

This familiar and unfamiliar vocabulary made Zhao Changxing stunned for a moment, and couldn't help but recall the time when he attended someone else's wedding on Earth.

Before you know it, decades have passed...

Seeing that Zhao Changxing was silent, Chen Feng said anxiously: "Father, don't they always say on TV that people have to get married when they reach a certain age? They still have to sleep on the same bed and have children..."

Qian Yue pinched Chen Feng quietly, causing him to grin his teeth in pain.

Zhao Changxing woke up from the memories, and a smile immediately appeared on his face.

"It's a good thing. Good boy, good boy. Then...it's better to hit the sun than to choose a date. Let today be your wedding ceremony, okay?"

"Good! Good!"

The children of the second generation cheered one after another, and the sound spread throughout the entire Tinder spacecraft.If there is air outside the spaceship, the sound might be transmitted directly to Human Base One.

"Wait a moment."

Zhao Changxing stood up suddenly and quickly walked to the back of the cabin.Everyone looked at him, wondering what he was going to do.

But Zhao Changxing took out dozens of apples, handed them to the kitchen robot, and issued an order.After a while, the kitchen robot, under Xiaoxi's control, brought out a bucket full of fruit juice.

"On Earth, when a couple gets married, they have to toast the guests to express their gratitude. We don't have alcohol here, and we can't drink alcohol. Let's use fruit juice instead."

The kitchen robot fetched the cups and poured the juice for everyone.The children of the second generation looked at the apple juice and their eyes almost straightened.

Apples are very precious.There is only one apple tree planted in the entire human base No. [-]. Due to environmental factors, the annual fruit growth is pitifully small.This stuff is usually used by Zhao Changxing to reward those who perform well, and he is reluctant to eat it, let alone use it to squeeze juice.

They have only seen juice on TV, but never drank it.Zhao Changxing was also happy today, so he became cruel and directly took out dozens of apples to squeeze juice.

Qian Yue, who was a little shy but still bold, and Chen Feng, who was even more shy, stood up and came to Zhao Changxing with a cup.

"Thank you, Dad."

Both of them bowed to Zhao Changxing at the same time.

"Good boy, good boy."

(End of this chapter)