King of Apocalypse is a Manga/Manhwa/Manhua in (English/Raw) language, Action 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

Qin Yu was killed a few hundred years into the future during the apocalypse due to a misjudgment. He then traveled back in time before the apocalypse kick off, relying on his battle hardened apocalypse experience and techniques, Qin Yu rapidly developed into a formidable opponent, passing through hurdles, saving the world all while protecting his beloved sister.