Previously, Pang Xuelin had spoken on the phone with his parents in this plane, hoping that they would return to Jiangcheng to work.

But then it turned out that this was simply not realistic.

In this era, everyone must work except for minors, the elderly, the sick, and the disabled who cannot take care of themselves.

Everyone builds a credit account from birth with credit points on it.

Credits can be used to buy and exchange various necessities, and everyone must work to earn credits, and once the credits are cleared, they will lose their eligibility to enter the dungeon.

In a sense, credit points are similar to money in real society, and they are the foundation of everyone's survival in this era.

However, there are also differences between credit points and currency, for example, everyone's credit points cannot be traded, and parents have more credit, which does not mean that their children have more credit, and parents cannot transfer their credit points to their children.

In order to prevent fraud, the computer will monitor the use of each person's credit records, and the issuance of credit points is also carried out by the supercomputer, and the coalition government can only do regular maintenance and inspection to prevent bugs in the issuance process.

At the same time, credit points are also related to dungeon lottery eligibility, basic social security eligibility, etc.

Pang Xuelin's parents had signed a 10-year contract with Planetary Engine, a coalition government, to work at Shanghai No. 2 Engine.

Their work will allow Pang Xuelin to enjoy free food, education, housing and medical care, as well as early access to the dungeon.

Even whether grandparents can receive their pension normally is related to whether they can work normally.

And every year, they only have seven days off to come back and reunite with their families.

This is not only the living conditions of Pang Xuelin's family, but also the rest of Chinese families and even most families around the world.

In a way, this is a time when everyone is under heavy pressure, and it is precisely because of this pressure that humanity can complete the feat of building 12,000 earth engines and dungeons in 30 years.

If Pang Xuelin has a high enough authority or status, it may be possible to transfer his parents back to Jiangcheng to work.

But now, he's just a fifteen-year-old high school student, and he can't do anything, not even if he wants to go to Shanghai to see his parents.

Because the law stipulates that unless there are special circumstances, such as Pang Xuelin's participation in the Olympiad Winter Camp, or special circumstances such as Yao Bingxia's father being selected for the Navigator space, minors are not allowed to travel across the city.

All Pang Xuelin can do is to prepare these life sacs in advance, so that they can be rescued safely in a possible crisis.

……

In the following time, Pang Xuelin's life became regular again.

Every day when I go out early and return late, except for picking up Yao Bingxia to and from school, I spend the rest of my time in the laboratory.

Du Jiaxiang is the director of the laboratory, and specially arranged for Pang Xuelin to help with the experiments, including Xiao Gao Gao Tianyi.

Pang Xuelin can't do it, just provide theoretical guidance according to the content of the paper, and these long-trained experimental dogs will naturally arrange everything properly.

The experiment went well.

Half a month later, Pang Xuelin successfully obtained a batch of single-walled carbon nanotubes with a purity of up to 99.8%, although there is still a certain distance from Wang Miao's ultra-high purity of 99.99999%, but it has made Gao Tianyi and them overjoyed.

Even Du Jiaxiang, although he was more optimistic about Pang Xuelin's experimental plan, did not expect them to produce results so quickly.

Pang Xuelin is still a little dissatisfied, although these single-walled carbon nanotubes can be used as battery polymer additives and raw materials for CMOS devices, but they can't be made into flying blade materials like Wang Miao and them.

The purity is still too low.

However, it is enough to write a thesis.

It took a week for Pang Xuelin to use the existing experimental data and refer to the information given by the system to successfully complete the writing of his first materials science paper.

He then handed the paper to Du Jiaxiang for polishing.

Mr. Du returned it almost without changing a word, and in his words, the paper was good enough that it didn't need polishing at all.

At the same time, Mr. Du rejected the suggestion to sign the paper.

Pang Xuelin had no choice but to write his name on the corresponding author, and the first author wrote Gao Tianyi's name.

After all, in the process of the experiment, Gao Tianyi played a great role and helped him a lot.

The remaining few doctoral students who participated in the experiment were also added to the list of second authors.

This made Gao Tianyi and them excited, after all, everyone understands how significant this paper will be after it is published.

At Du Jiaxiang's suggestion, Pang Xuelin submitted this paper to Nature Nanotechnology.

In the days of waiting for a reply, life became uneventful again.

Pang Xuelin devoted himself to learning every day, and together with Gao Tianyi, they continued to improve the experimental protocol to improve the purity of single-walled carbon nanotubes.

However, as the time to enter the dungeon is getting closer and closer, there are many rumors in society.

Some people say that because of the completion of the construction of the planetary engine, human beings no longer need to do so hard work, and the government will gradually relax restrictions on all areas of society, especially the cultural field.

It is also said that after entering the dungeon, there will be a major reform of the credit point system, gradually stripping it of its relationship with social security and giving it a more prominent monetary attribute.

In short, for the coming dungeon life, human beings are full of beautiful longing and imagination, and everyone is tired of the sun that never sets in the west and endless labor.

That afternoon, Pang Xuelin came out of the laboratory, came to the gate of Jiangcheng Middle School, picked up Yao Bingxia after school, and then rode home.

"Brother Xiaolin, tomorrow my grandfather and I are going to enter the dungeon, I heard grandpa say, are you going to stay on the ground for a while?"

Pang Xuelin said with a smile: "Yes, I still have a lot of things to do over there at Jiang University, and it is estimated that I will enter the dungeon with my classmates in Jiang University in the middle of next year!" ”

"Then you remember to come to play with me when the time comes, I heard from my grandfather that the houses we were assigned were not in the same area."

"Don't worry, when I enter the dungeon, I will definitely go to you!"

The two talked and laughed, and soon rode their bicycles to the vicinity of the community.

At this moment, Pang Xuelin suddenly felt that the road surface was shaking, and then, the asphalt road in front of him suddenly began to tear, cracks grew rapidly, and the entire earth shook violently.

Boom Boom –

There was a loud bang, as if a giant beast from the depths of the earth had been awakened.

"Ah......h

Yao Bingxia let out an exclamation.

"Xiao Xia, get off!"

Pang Xuelin's face changed greatly, he hurriedly stopped, pulled Yao Bingxia over, ran to the open space on the other side of the road, and made sure that there were no buildings around that might hurt them, before he stopped and looked at everything around him in horror.

An invisible force tore the land apart, and the earth shook violently, Pang Xuelin and Yao Bingxia couldn't stand at all, so they could only sit on the ground.

A tall building in the distance gradually leaned down and then crashed into another, sending smoke and dust in the air.

In an instant, the house collapsed and the ground shattered.

People on the street looked for a place to hide, and cries and cries abounded.

An unprecedented super earthquake swept through Jiangcheng.

The shaking continued for nearly two minutes before it gradually stopped.

Pang Xuelin stood still, and it wasn't until Yao Bingxia's cry woke him up from all this nightmare.

"Woo, Brother Xiaolin, Brother Xiaolin, Woo, what should we do?"