I endure eternally in the interstellar realm

In this science fiction tale, Yan Xia, the sole survivor of Earth's destruction caused by a gamma-ray burst, embarks on a cosmic journey with the artificial intelligence companion, Ella. Together, they venture into the vastness of space.

They begin by constructing interstellar warships on a scale of thousands, tens of thousands, and even millions of meters, establishing gigantic interstellar cities spanning billions of kilometers. As their technology advances, they uncover the truth behind Earth's demise and engage in interstellar conflicts.

With their formidable technological prowess, they unite numerous civilizations, forming a powerful federation that spans tens or hundreds of civilizations. They control billions of stars and wage wars across dimensions. Each voyage requires calculations spanning thousands or millions of years, and each battle is a culmination of hundreds of thousands of years of strategy.

This is an unimaginable journey through the cosmos and an epic saga of human civilization's triumph in conquering the universe.