After Xia Xue passed away from Li Shimin, her whole person seemed to have completely collapsed, and she was deeply immersed in grief. It was as if the soul had been drained from her body, leaving only a lifeless, beautiful shell. I didn't think about tea and dinner for a few days, and people became more and more emaciated.

One night, Xia Xue had a terrible dream, dreaming that a super black hole in the universe orbited near the solar system, swallowing the sun, Mercury, Venus, Mars, Jupiter, Saturn, Uranus, Neptune, the moon and the earth, everywhere there was a hellish sea of fire and magma, everywhere there were screaming and wailing humans, everywhere weeping women and children, everywhere there was death and darkness...... Xia Xue woke up from her dream in a cold sweat, and she suddenly remembered her sacred and important mission.

She thought back to the time she lived in more than 2,000 years later. Although the technology of that era was advanced, it was not as beautiful as people imagined, and the entire human race on the earth was facing the catastrophe of annihilation.

She thought back to how she had traveled to ancient times, and although it had been a long time, everything was still vivid, as if it had just happened yesterday.

……

In 3014 A.D., the earth human beings from the twenty-first century after nearly a thousand years, although science and technology continue to advance, but due to the population. Explosive growth, the earth is overcrowded, all kinds of food, fresh water, minerals, land, forests, energy and other resources are almost exhausted, countries in order to compete for limited resources, several large-scale world wars have broken out, including nuclear weapons, chemical weapons, biological weapons and other weapons of mass destruction have been put into use, plus large earthquakes, large volcanic eruptions, large tsunamis, the expansion of the ozone hole, climate anomalies caused by the greenhouse effect, the spread of new viruses, terrorist activities, ethnic conflicts, Natural and man-made disasters caused by famine, disease, and so on have caused mass human deaths and reduced the population by three-quarters. Social production and the development of science and technology have also been greatly affected, and even the social productive forces have regressed by more than 200 years.

At this time, astronomers found that three asteroids with a diameter of more than 20-50 kilometers are flying towards the earth, which is expected to hit the earth in the next 520 years, which will be devastating. About 65 million years ago, an asteroid with a diameter of 10 kilometers hit the earth, causing the "king of land" at that time, the dinosaurs, to become extinct on the earth. The energy of an asteroid hitting the Earth is equivalent to the energy produced by the explosion of 10 million Hiroshima bombs, and the impact wave will destroy any living thing within a radius of 300 kilometers. The dust and debris from the collision will also create a "collision winter" that will wipe out most living things.

If an asteroid crashes into the ocean, it will trigger a huge tsunami that will wipe out the coastline and spray seawater into the atmosphere, destroying the ozone layer in the atmosphere, and exposing survivors to lethal ultraviolet radiation. And this time the asteroid is bigger than the one from the time of the dinosaurs, and there are three of them in succession.

Moreover, scientists have also discovered that a huge star about 850 light-years away from Earth, codenamed WRX204, has the potential to have a supernova explosion in the next 670 years. The Earth is in the path of a dangerous gamma-ray burst, and the large amount of gamma rays produced will reach the Earth, which will destroy the molecular structure of the stratosphere of the Earth's atmosphere, form new nitrogen oxides, and encircle the Earth in a layer of "tan smog", and severely damage the ozone layer. At this point, the UV rays are at least 50 times stronger than normal, enough to kill life on the surface. During this period, most of the organisms living on or near the surface, especially the shallow marine life, were almost extinct. The second effect of gamma rays is that the large amount of nitrogen oxides causes the temperature of the Earth's atmosphere to drop and the surface to cool, which in turn leads to the onset of ice ages.

Scientists have also observed an even more frightening phenomenon, which is that the sun may die prematurely in the next 1,000 years, entering a period of instability. The sun provides energy for everything on earth, and the fate of life on earth is closely related to the fate of the sun. If the sun enters the decay ahead of schedule, it is an unstable period before the decline, which is enough to destroy the entire life on earth.

In the shadow of the catastrophe, all countries on the earth have finally realized that the people of all countries are in fact a community with a shared future, and they can either unite as one, concentrate all resources and forces to vigorously develop space development and space exploration, and find a new planet suitable for human survival in the vast universe as soon as possible, so that human civilization on the earth can continue to survive, or continue to kill each other and wait for death. Finally, all the major powers on the earth reached an agreement under the framework of the United Nations to stop all human infighting and internal friction, concentrate all wisdom, resources and strength on the earth, and make every effort to develop the space industry for the survival of mankind. And every second counts, because time is only a few hundred years. By United Nations resolution, a striking countdown monument was erected in the United Nations Square, on which was written in the commonly used Chinese: "Countdown to Earth Destruction Day Monument". A 500-year countdown is set up on it to remind people to unite and work together to save the earth's civilization.

In order to control the excessive population growth and the consumption of too many precious resources, countries around the world have adopted birth control policies, each family advocates a maximum of four children, and encourages only two to three children, but this policy is not mandatory, mainly through economic incentives and public opinion guidance.

In order to ensure eugenics, enhance the potential and ability of human beings, and promote the rapid development of science and technology, the United Nations unanimously adopted the human gene optimization technology that the conservatives have been obstructing in the past. Almost all of the people in every important position on the earth are the new generation after the optimization of genetic technology, and they are jokingly called: version 4.0 of humanity. Primitive Stone Age humans are jokingly called: version 1.0 humans, humans who have entered the Iron Age Cold Weapon Age are nicknamed version 2.0 humans, and humans who have entered the era of the industrial information revolution without genetic optimization are jokingly called version 3.0 humans.

The lifespan of genetically optimized new humans in version 4.0 is generally about double that of humans in version 3.0, and the average lifespan has reached more than 160 years, and the more gifted can even live to about 200 years. The aging process is greatly delayed, that is, people in their 100s look and do the same as ancient humans in their 40s, and they can still work and live in good health.

Childbearing is no longer the main obligation of women, and in order to eugenics and fertility, the fertility rate is reduced, so the menstruation of women who ovulated once a month in the past has basically been reduced to once a year, and menstruation has been changed to "annual menstruation", and women will no longer suffer from the pain of monthly periods. There is only one month of the year when ovulation and menstruation, there is a possibility of pregnancy, and the month of ovulation is different for each woman. There is no need to worry about pregnancy in the rest of the months, so men and women in this era can basically enjoy love to the fullest, without fear of violating the birth control policies of countries around the world, and there is no need to take anti-yun drugs that are harmful to human health or use other very inconvenient anti-yun tools like in the past. It is very beneficial to alleviate the huge pressure on human beings caused by the imminent end of the world, so young people from all over the world are strongly supporting human genetic optimization technology.

Due to the decrease in the number of ovulations per year, new human women will basically become extinct until they are about 140 years old. warp, greatly delaying aging. Even fertility can be made of high-tech artificial seeds. After the completion of the palace, the burden of women's childbirth has been greatly liberated, so women in this era are basically working people, and their social status has been greatly improved.

Since there is only one month of ovulation every year to menstruate, and the time of menstruation is generally 1-2 days, at most 3 days, far less than modern and ancient human beings, therefore, women in the future era are basically rarely affected by dysmenorrhea and menstrual syndrome, and after the optimization of genes, women in the future era are far superior to modern and ancient humans in terms of strength, speed, endurance, reaction, etc., so the performance of women in the future era and new era is not inferior to any man in various positions, and even includes many jobs that require physical strength and physical fitness. For example, soldiers, construction workers, etc., you can basically see many women with excellent physical fitness. In other important positions based on intelligence, you can see beautiful, intelligent, and capable female elites everywhere, which is an era of real equality between men and women, because no man dares to underestimate any woman. Women also enjoy the fun, self-confidence, sense of achievement, sense of value, pride, creative pleasure, and high status that career work brings, so they also enjoy work and career more. In this era, no woman in the future era is willing to be a "soft girl", and "soft girl" is not only looked down upon, but also laughed at. The women of the future era are basically beautiful "female men" with strong independence.

In order to prevent employees from suffering from low productivity and health damage caused by excessive fatigue, and to attract talents, in addition to high salaries and bonuses, major companies around the world also have benefits such as weekly "weekends" and "paid annual leave" about 30 days a Chinese New Year's Eve. Therefore, the work of men and women in this era is not so hard and crazy, they are very smart, and they all know: there is no contradiction between working hard and enjoying life. They know how to prepare for the coming end of the world in order to be more balanced and durable.

Although the end is approaching, the United Nations and the governments of various countries around the world are relatively rational and have not adopted a "sporty" development model for the aerospace industry of the general mobilization of the whole people. On the one hand, it is easy to cause social panic and breed instability, and the current stability is more important than the future threat. Second, because they know that aerospace can only be done by professional scientists, engineers, astronauts, and other experts, and that the whole world should fully cooperate and regard the aerospace industry as the number one strategic work, and there is no need for everyone to participate, and many things cannot be done well by relying on a large number of people, especially in high-tech industries such as aerospace and aerospace, which cannot be helped by laymen.

As for other professions, doctors and nurses are encouraged to perform their own duties and do their own professional work well, doctors and nurses can rest assured of their medical work, police officers can rest assured of their public security work, civil servants can rest assured of their public service work, catering, hotel, tourism, supermarkets and other workers can rest assured of their service work, and musicians, artists, novelists, film directors, etc., can rest assured of their artistic creation, because music and art are also important treasures of human civilization and cannot be abandoned because of space work. Various sports leagues, the Olympic Games, etc., have also been held as usual without any impact. As for the primary industries such as agriculture and animal husbandry, which are related to the people's livelihood, they have not been affected in the slightest, and more attention has been paid to them, after all, "the people take food as the sky", and eating is the first priority. After such a strategy was implemented, the hearts of people around the world slowly became calmer, because the number of psychopaths and emergencies caused by the stress of the end times also decreased significantly.

The only ones affected are the military dui and military huo arms manufacturers in various countries. The number of military services in various countries has been greatly reduced, and the number of military purchases has also been greatly reduced, causing many military businessmen to switch careers to invest in the most popular aerospace industry at present. For example, the manufacture of aircraft carriers, attack submarines, and large warships, which can only be used in the civil war of human beings on the earth and consumes special resources, has basically stopped, and some have even been dismantled and used in the construction of spaceships and space probes. Weapons research mainly focuses on the high-tech new weapons needed for space warfare to prevent attacks by alien civilizations or aliens, but so far, although there are countless rumors, human beings still have not encountered real aliens or alien creatures, because the universe is too big, the planets suitable for the survival and evolution of life are too rare, and the chance of contact between the civilizations of the two planets is simply too small.

Due to genetic optimization, human beings in this era, regardless of male or female, basically have no deformities and disabilities, and their appearance is not crooked and cracked, and they are all very beautiful. They are all relatively well-proportioned and healthy in height, and there is neither too short dwarfism nor too tall gigantism. The average height of men is about 1.8 meters, and the average height of women is about 1.7 meters. In this era, there are very few dwarfs who are less than 1.5 meters tall, but they are not blindly pursuing height. Scientists have found that for every 5% increase in height, there is a 10% increase in body surface area and a 16% increase in weight. People with tall stature have relatively long distances between organs in the body, longer routes of blood circulation, and heavier burden on the heart. In addition, in order to meet the physiological needs of tall stature, it is necessary to obtain more water, oxygen and food from outside the body, and consume more energy. Moreover, people who are too tall have a higher incidence of cardiovascular disease and kidney disease than short people. Therefore, in order to control excessive energy consumption and maintain the health of human beings in the future era, height is also moderately controlled when genetic optimization is carried out. The tallest man in this era was a basketball player, and he was only 1.95 meters tall, which was more than 2.2 meters tall than many giants in previous eras, and even reached 2.72 meters.

Moreover, the new human body in the future era is very well-proportioned, there are no overweight big fat people, and there are no "bean sprouts" that are too underweight. They are all healthy and strong, and there are basically no genetic diseases. Diseases that have been incurable in the past era, such as cancer, AIDS, hepatitis B and C, diabetes, schizophrenia, lupus erythematosus, Alzheimer's disease, etc., can be easily cured with new technologies such as genetic biotechnology.

In this era, human beings have been more advanced due to genetic optimization, the potential of human beings has been higher, science and technology have developed unprecedentedly, all countries in the world have been unprecedentedly united, and there have been basically no more wars and conflicts, and human beings on earth are eagerly racing against time to find a new home in the universe, and human manned spacecraft have rushed out of the solar system and entered the broader galaxy to find planets that can be colonized, and various probes have also flown to more distant galaxies, but unfortunately there is still no new planet suitable for human survival so far. However, most of the new humans on Earth are not discouraged, and they firmly believe that through hard work and human wisdom, they will be able to find a new home for human beings in the universe before the earth is destroyed, and continue the civilization of human beings on Earth. However, there are still a few pessimists who think that in just over 500 years, can the technology of human aerospace and space exploration really be greatly improved, and in the vast and infinite universe, among countless planets, can human beings find a planet suitable for human survival in just 500 years? If it could be another 500 years, maybe the hope would be even greater.