Abandoned Universe is a Manga/Manhwa/Manhua in english language, manhua series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

One day, the earth’s vitality changed, and people began to practice ancient martial arts. Seventeen years later, alien invaders invaded the earth, As a result, human beings were slaughtered and enslaved. In order to stop the alien invaders, all the sovereign countries on the earth united and began to resist, opening the nuclear era on the earth, but they still could not get rid of the enslavement of the alien invaders…