I Build Blue Star in the Interstellar Age

In 3205 AD, humanity on Blue Star entered an era of explosive population growth. Five hundred years earlier, natural disasters had decimated the human population, while tectonic movements had merged all the continents into one vast landmass. Blue Star became a world of half ocean and half land. The survivors, regardless of race or nationality, lived together, and after two hundred years of adjustment, they all became citizens of the Republic. In 3000 AD, humanity entered the high-tech era. Over the next two hundred years, the population soared to fifty billion. In just four years, all of Blue Star's resources were exhausted. Then Blue Star underwent a mutation. By the time humanity escaped the planet, only one hundred million people remained. They wandered through space for a hundred years before finding another habitable world, which they named Central Star. From then on, Blue Star became a planet forgotten by the world.

Later, Yang An was fortunate enough to return to Blue Star, only to discover that its history was all a lie.