Moshi Chongsheng: Wokao Kai Xiangzi Wending Dianfeng

When the apocalypse hit, the protagonist was betrayed and killed by his manipulative girlfriend, only to be miraculously reborn one year before the end times with a powerful system at his fingertips! Getting a head start, he hoards supplies and spends a fortune building an impenetrable safe haven. Using his system to continuously boost his strength, he systematically crushes every enemy from his past life. From worthless nobody to ultimate powerhouse, revenge and redemption go hand in hand as he walks the path to becoming the king of the apocalypse!

(Source: WebComics)