Get on the bus back to Huangshatou Town.

Gao Zhongxuan looked at the lush greenery outside the car window while holding his chin and thinking.

After the cooperativeization, many rural areas are now in a state of coexistence of agricultural workers and self-employed people, and the retirement and re-employment of agricultural workers have entered the stage of promotion.

His grandparents are still alive, and the two elders have caught the last train of the biological computer, and if the biological computer is launched in a few years, the two old people may not be able to survive until that time.

Although biocomputers cannot increase the limits of human life, they can increase human lifespan.

It seems that these two sentences are a bit contradictory, but in fact the life limit of living things.

Theoretically speaking, the limit of human life is generally believed to be around 120 years old, which comes from a scientifically rigorous theory, which is also known as the Haflik limit.

The aging and death of the human body is caused by the aging and death of the body's cells, and the human body cells will divide, and new cells will replace the senescent and apoptotic cells, but this division is not unlimited.

Normal somatic cells can divide about 50 times on average, and the cycle of each division is about 2.4 years, and the limit life span of a person is about 120 years old.

So why can human cells only divide 50 times, and is it possible to increase the number of divisions of human cells by technical means

This necessitates knowing why human cells can only divide 50 times

To put it simply, there is a substance called telomeres at both ends of the gene, which plays an important role in the process of cell replication, which is mainly responsible for maintaining the integrity of chromosomes.

However, in most somatic cells, telomeres are limited in length and become progressively shorter as the cell divides more times.

When telomeres reach a critical length, gene expression is affected and expression changes, which in turn leads to cell aging and death.

This mechanism is the biological mechanism behind the Heflik limit theory.

Obviously, this is a cutting-edge scientific research project in the life sciences, and Fang Ge and the others are currently researching this technology.

However, even if cells can only divide 50 times, the average life expectancy of human beings is still not the limit. Note: The current average life expectancy of human beings is about 65~80 years.

After the implantation of the biological computer, the new human will not be harmed by diseases, viruses and bacteria, and the biological computer will continue to eliminate harmful substances in the body and maintain human cells.

The lifespan of a new human can reach the limit of human life of about 120 years.

And until the high-flix-flik limit of the cell arrives, a relatively healthy and awake state can be preserved.

At present, the Institute of Life Sciences of the Academy of Sciences is researching breakthroughs in the division limit of gene telomeres on the one hand, and stem cell cloning and stem cell repair of brain cells and cardiomyocytes on the other hand.

As long as these two aspects are broken, human life can be truly improved.

……

Gao Zhongxuan's grandparents, one is 76 years old and the other is 78 years old.

A biocomputer was implanted some time ago, and now it is having a second spring.

The retirement system for agricultural workers has been implemented in some areas this year, with the retirement age at 70 years old and the pension currently being 2,000 yuan per month.

The reason why he retired at the age of 70 is mainly due to the implementation of the New Humanity Program, and the human life expectancy has reached the limit.

In this way, retirement at the age of 60 is too early, and some agricultural workers can choose to re-employment or re-start a business after retirement, and re-employment does not affect the pension of agricultural workers.

Just like Gao Zhongxuan's grandfather, after retiring this year, he chose to become a forest ranger.

The bus stopped at the entrance of his hometown.

"Huangshatou North Village has arrived." The driver shouted loudly as he pressed the door switch.

Gao Zhongxuan, who was stunned, reacted and hurriedly got out of the car with his suitcase and backpack.

After the bus left, he stared blankly at the unrecognizable Huangshatou North Village, if it weren't for the big stone monument standing on the side of the road, which was carving the five big characters of Huangshatou North Village, Gao Zhongxuan estimated that he would not be able to find his hometown.

Rows of single-family cottages, with a radius of no less than 1 kilometer, are on the north side of the village entrance, and weeping willows, poplar trees, and white mulberry trees are planted on the lake embankment.

On the south side, corresponding to the artificial lake, is a large glass greenhouse that glistens in the sun.

Pulling his suitcase, he slowly stepped into the village road.

In the guard room at the entrance of the village, an old man took down the cigarette stick in his hand: "Hey, isn't this Xiaoxuan of the old five families?"

"Grandpa Jiu, don't you go home from the south to take a look, I'm nagging back."

The old man took another puff of cigarette and shouted at Gao Zhongxuan: "You kid, don't find the door, your house is at No. 15, Lane 5." ”

"Thank you."

After walking more than 200 meters, I saw a swimming pool field next to the artificial lake, and there were four swimming pools in it.

Many children and teenagers are playing in the swimming pool, which is unimaginable for the northwest where water resources were scarce before.

He didn't bathe five times a year during his childhood, and how could he be as extravagant as a child now, playing in the pool.

Walking into the residential area, they are all three-storey villas, not the same baroque style or Western style, but small villas with local characteristics.

The house absorbs the cave and some local folk customs, and each house has its own front and back yards, or planted with flowers and trees, or planted with vegetables and fruits.

No. 15, Lane 5.

He rang the doorbell.

"Here we go!" There was a rush of footsteps, and a seventeen or eighteen-year-old girl opened the big wooden door and suddenly shouted in surprise:

"Second brother, why are you back?"

"I bought you a present, take it." Gao Zhongxuan took out a box from his backpack and handed it over.

"Brainwave glasses! Thank you, second brother. The little sister happily took it.

In fact, brainwave glasses are not expensive now, and a brainwave glasses with ordinary configuration costs more than 1,000 yuan.

When he entered the house, he kept walking around to take a look, and the little sister helped him pull the suitcase into the room.

Gao Zhongxuan is the third brother and sister, but his eldest brother Gao Zhongmo has already started a family and lives in the small villa next door.

More than half an hour later, the sun was setting outside.

Most of the agricultural workers in the village have left work, including Gao Zhongxuan's parents, but their grandparents do not live with them.

The main thing is that the rangers have staff dormitories, and the two elders are now healthy and nimble, so they simply live in the rangers' dormitories.

One of the two old people takes care of the mountains and forests, and the other cooks or grows some vegetables and fruits, living a life on the side of paradise, which is a portrayal of the life of many retired agricultural workers.

Although there is only a pension of 2,000 yuan per person, the two of them have about 6,000 yuan a month plus the salary of the ranger.

It doesn't seem like much money, but the problem is that now Huayuan's purchasing power is almost three times that of before, and there is no need to worry about his own physical problems, his children's houses and education.

With an income of 6,000 yuan per month, even if you travel in China, you can travel four or five times, and it is a very good tourism project. 78 Chinese first release www.7* m.7*

There are even many elderly people in the city, who are looking for jobs such as forest rangers or mountain rangers, and can live in the countryside, which is already a new trend.

After having dinner with his family, Gao Zhongxuan became more and more determined to stay in his hometown, anyway, he lives in his hometown now, and it does not affect his work.

In addition, he plans to start some entrepreneurial projects at home.