On a certain day in 2012, the official newspaper of country Z published a very brief message: the Tianjia of country M observed through a large radio telescope that there is likely to be a terrestrial planet suitable for life in the Proxima Centauri field about 4.5 light-years away from the earth.

The news was extremely brief, and it was quickly annihilated in a sea of all kinds of political and financial news and many celebrity scandals, without causing the slightest wave.

On December 25, 2012, the people of the world quietly disappeared in a state of fear, nervousness or indifference, and the apocalyptic theory of the end of the world was self-defeating. People who have been stimulated by the blockbuster "2012" in country M finally stop worrying about the fate of the earth and themselves, and return to normal life. In people's consciousness, the apocalyptic theory is an absurd lie of the century. However, there seems to be providence in the dark, and it is the past of the end of the world that seems to have really opened the prelude to the "end of the world".

On January 3, 2050, the United Nations announced that the world's total population would reach 10 billion, and the era of population explosion had truly arrived. Country Z, which has always been the most populous country, has a relatively slow population growth rate due to the long-term implementation of the family planning policy, but due to the impact of the huge population base, it has also reached a total peak of 1.9 billion; YD, another populous country in its neighborhood, surpassed country Z in one fell swoop as early as 2025 and reached a frightening 2.3 billion in 2050; However, the population growth rate of developed countries, which control the vast majority of the world's energy, resources and wealth, has been hovering at a low level, and its population is less than a quarter of the world's total population.

With the rapid growth of the population, mankind will face more severe crises of land, fresh water, energy and resources, and the sustainable development of mankind, especially the rights of people in developing countries to subsistence and development, has been severely challenged.

A resource crisis inevitably leads to a political crisis. In order to have a greater say in the future war for resources, countries with common interests have formed alliances. Based on the SCO, country Z united with country E, five Central Asian countries, Argentina, Iran, Pakistan and other 13 countries to form the "Yenching Alliance", known as the "Northern Alliance" in history; Country M further expanded NATO, absorbed some pro-American regimes in Europe, Australia, and South America, and signed an alliance in Washington, which was historically known as the "Chinese Union." The two sides are engaged in fierce overt and covert competition in various fields, especially in the field of energy, and the world situation is extremely tense and on the verge of eruption.

On May 7, 2070, Iran, an important member of the Organization of the Petroleum Exporting Countries ("OPEC"), issued a statement that shocked the world, announcing that it would permanently withdraw from "OPEC" and no longer export oil to any party, so as to protect its own interests and the right of its people to survive and develop. This announcement led directly to the outbreak of a tragic global war, known as World War III, also known as the "Energy War". On May 17, the two major alliances intervened almost simultaneously, and the war swept through most of the world's oil and important strategic asset areas in just half a month. This is a war that has nothing to do with justice or ideology, and what all parties involved in the war are fighting for is the future and destiny of their own nation for the next hundred years.

With the help of modern high-end weapons, the war years lasted only 3 months. However, the cost is also staggering. The war resulted in 70 million military and civilian casualties on both sides, 3 million tons of oil consumption, and nearly $30 trillion in property damage. What is even more serious is that the war has caused serious damage to the entire ecosystem, and in the more than 20 years since the war, extreme weather phenomena have occurred frequently, and due to the large number of small tactical nuclear weapons used by both sides in the war, many life forbidden areas have emerged, making the already very limited living space even narrower. Earth, a beautiful planet of life, has become battered and tattered. This war once again proved a truth: there is no real winner in a war.

The brutality of war prompted an awakening. Leaders recognize that war does not extricate humanity from a crisis, but only exacerbates it. Dignitaries from all over the world have once again gathered to discuss the future of humanity. After long and arduous tug-of-war negotiations, on May 17, 2080, the 10th anniversary of the outbreak of the energy war, the United Nations issued the Declaration on the Future of Mankind, laying out a blueprint for the future development of mankind: 1. Strictly prohibit war. 2. Vigorously govern the earth's environment and develop new alternative energy sources. 3. Integrate the scientific research forces of various countries and jointly develop space technology, with a view to realizing the possibility of interstellar migration......

Under the influence of the Declaration on the Future of Mankind, countries around the world have carried out unprecedented and extensive cooperation, in which ideological, ethnic, racial and religious disputes have been gradually abandoned, and the great union of mankind has been truly realized. In 2145 AD, after 200 years of existence, the United Nations announced the suspension of all its functions and its replacement by the "Earth Federation". This is a country that includes the peoples of all countries in the world with a unified constitution, a unified currency, and a unified army. The goal of the establishment of this federation is directed at the vast starry sky!

In 2175 AD, after the research of federal scientists, mankind finally discovered an element called "crystal steel" in the depths of the moon, on the basis of which scientists have developed a new generation of alloy, which has excellent characteristics such as light weight, high hardness and corrosion resistance, and fully meets the requirements of the development of new spacecraft.

In 2213 AD, large-yield nuclear fusion was controlled, and on this basis, a new space engine was successfully developed. The use of this engine allows the spacecraft to accelerate in space to 1,000 kilometers per second, greatly exceeding the limit of human speed.

In 2248 AD, after more than 200 years of unremitting research by scientists, it was proved that the "wormhole" in the universe does not exist, the space folding theory has huge flaws, and human beings must carry out a long interstellar journey if they want to land on other planets. This conclusion was frustrating, but it inspired more people to have the courage and enthusiasm to explore the stars. The Federation resolutely decided: to use global forces to develop and develop giant interstellar immigration ships, recruit interstellar voyage volunteers, and use relay methods to achieve the grand goal of going out of the solar system and landing in alien domains.

After more than 70 years of struggle by several generations, on December 25, 2312 AD, the first interstellar manned long-distance ship of mankind, the "Atlantis", was successfully launched! This is a day that deserves to be remembered forever! On this day, a new era in human history began. On this day, the Federation announced the end of the Common Era year and the introduction of a new chronological method, the ephemeris. This year is known as the first year of the ephemeris!