The night is deep and the cold wind is howling outside.

It’s the end of the year again, and the snow in the sky has begun its carnival again.

In the room, the coal in the heating stove was about to burn out. Yang Xiaotao slowed down the beauty in his arms, kissed her sleeping forehead, covered her with a quilt, put on her clothes, got up and came to the stove.

I exchanged the tongs for a briquette and the fire burned brightly.

Then he went back to the house and lay down on the bed.

Then open the personal properties panel.

I looked at the credits, which were still over 30,000, and then looked at the redemption column of the system, and found that there was nothing good.

But Yang Xiaotao is still looking forward to this weekend.

Because this Sunday happens to be the end of the month, and New Year's Day, which falls on the first day of 1968, happens to be Monday.

In other words, the exchange column is refreshed at midnight on Sunday.

This is a refresh time of a week, a month, or a year. If we follow the rules of the system, if good things are not refreshed, there must be something wrong with the system.

Therefore, Yang Xiaotao saved his credits and waited for that day to come.

However, 30,000 credits is still a considerable fortune.

Last time, out of urgency, I just unlocked Chemistry Mastery and got an elemental symbol pen.

If I had had this kind of pen in my previous life that could automatically judge right from wrong, the college entrance examination wouldn't have been so difficult.

However, level one chemistry proficiency requires 2,000 credits, while level two requires 5,000 credits.

This is much more expensive than mastering steelmaking.

But it’s expensive for a reason.

At this moment, Yang Xiaotao was hesitating whether to upgrade to level two.

Based on his familiarity with the system, the more credits he needs, the better things he will get.

Just like hard work and harvest, the more credits you earn, the richer your harvest will be.

I looked at the credits again, then looked at Chemistry Proficiency, and then put it on my wife’s hips, silently saying to my wife, give me good luck.

"System, improve chemistry proficiency to level two."

"Ding! Does the host need to spend 5,000 credits to upgrade sub-skills and become proficient in chemistry to level two?"

"Sure enough, it's expensive enough."

"yes!"

"Ding, congratulations to the host, the chemistry proficiency level has been improved, and the current level is level two."

"Ding, congratulations to the host, you have obtained the ultra-pure silicon production process."

The second Yang Xiaotao was sure, the familiar feeling appeared again.

The credits on the system changed rapidly from left to right like quicksand, and finally reached the number 26528. At this moment, a torrent also appeared in my mind as the credits disappeared.

In an instant, Yang Xiaotao felt countless knowledge filling his mind.

The amount of substances, moles, Avogadro's constant, atomic structure, molecular structure, redox reactions, reaction rates and chemical equilibrium, etc.

These theoretical knowledge are like the deep memories in the mind being dug out and then imprinted in the mind one by one.

It's like, these things originally belonged to him.

But now the impression is even more profound.

Yang Xiaotao also knew that these were just theoretical knowledge, and some even just remembered to do this, but he didn't understand why they did it.

And there is still a long way to go before it can be applied into practice.

However, these are not problems. This is level two chemistry proficiency. As long as he is willing, level three and level four can be achieved in minutes.

By then, he wouldn't believe it. With the systematic enlightenment, he couldn't become a chemist?

Then comes another reward.

A reward that made Yang Xiaotao feel that five thousand credits were well spent.

He was even a little excited, and even reached out to hug his wife in his arms, thanking his wife for the good luck.

Ultrapure silicon production process.

This is a very important semiconductor material.

In his previous life, Yang Xiaotao was exposed to computers when he was in junior high school. At that time, he often heard people talking about Silicon Valley.

Then you will know what this silicon is.

At that time, I naively thought they were just rocks.

There were a lot of stones by the river in the village. He could find a bunch of them of any size and color.

But when I got older and entered high school, I realized that stones are still the same stones, but silicon is an element in stones.

When I went to college, I had a clear distinction between stone and silicon.

After getting to know this kind of silicon deeply, you will understand why it is called Silicon Valley.

That is researching stones down to the atomic level. No wonder they are so powerful.

However, now that I have this ultra-pure silicon production process, I may not be able to thoroughly study the stone, and by then I will be able to establish a Silicon Valley, Silicon Slope, and Silicon Mountain.

Thinking of this, Yang Xiaotao fell asleep with the koi in his arms.

On such a cold day, it's still warm under the covers.

...

The next day, just after dawn, Yang Xiaotao felt movement around him. Then he opened his eyes and saw Ran Qiuye getting dressed.

"It's still early? Lie down for a while."

Yang Xiaotao sat up, but Ran Qiuye shook his head, "I can't sleep anymore, get up and tidy up."

As he spoke, he felt something strange in his mouth. He glanced at Yang Xiaotao again and then went out to wash up.

Yang Xiaotao grinned when his wife rolled her eyes.

My daughter-in-law is the cutest in this regard.

Even though he had done everything, he still looked tough.

After Ran Qiuye left, Yang Xiaotao couldn't sleep, so he simply sat on the bedside and checked the system panel.

Yang Xiaotao

Age:28

Credits: 26528

Skill:

Main skill: Engineer, level 6

...

Sub-skill seven: Steelmaking proficiency, level three

Sub-skill eight: Chemistry proficiency, level two

Exchange column: 5

Pets: Wood Elf, Chinese Pastoral Dog.

Items in the redemption column: hot pot soup (1/pack), hot pot dipping sauce (1/pack), peanut butter (1/bottle), seafood sauce (1/bottle), chive sauce (1/bottle)

"This is the time to eat hot pot."

Seeing all the hot pot ingredients in the exchange column, Yang Xiaotao wondered whether he should treat Huang Lao, Xia Lao and the others to a hot pot some other day.

After all, in this winter, eating hot pot, drinking and chatting is the most appropriate time.

Looking at the things in the system space, there are eighty kilograms of meat rewarded every month, as well as a bunch of vegetables. I can't even put them out at home on weekdays. It's just a good time to get together.

This chapter is not over yet, please click on the next page to continue reading the exciting content! "Well, this is possible."

Thinking of the Jiubu matter, Yang Xiaotao felt that it had to be put on the agenda.

Putting away the panel, Yang Xiaotao closed his eyes to rest, and then sorted out last night's gains in his mind.

The first is level two chemistry proficiency. The content instilled in Yang Xiaotao is the content of inorganic chemistry.

In his previous life, Yang Xiaotao remembered that when he was in college, this was a class he dedicated a whole semester to.

And that's an extension of basic chemistry.

Nowadays, the systematic indoctrination started from the most basic periodic table of elements, and then gradually deepened, and it was even more extensive. If he had not received several indoctrinations before, this time alone would have been enough for him to have a good sleep.

But this time I gained a lot.

Thinking of this, I looked into the production process of ultrapure silicon.
To be continued...