Doomsday War Emperor

Zhao Xuan struggled to survive in the apocalypse for three hundred years, only to be forced to blow himself up in the end. When he woke, he discovered he had returned to the very moment Earth's apocalypse began. Having lived through the apocalypse once before, he swore to change the tragic fate of Earth's civilization, which had been reduced to the lowly servants of alien civilizations, and make sure it stood proudly among the stars... (The completed works The Doomsday Hegemony and Super Dragon Son-in-Law, each over three million words, are available on Zongheng. If you're looking for something to read, check them out.)