Abandoned Universe

Abandoned Universe summary:

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…