What Should I Do If My Body in the Original World Is Still Alive After Reincarnation?

Ling Hao, an ox-horse young man, got into a car accident on his way to get off work and his soul was reincarnated into another world as a system grandpa? No, I want to be resurrected, I want to seize the body, I want to defy heaven! After finally seizing the body of the young monk from the Demon Sect, he accidentally killed the elder's son? No, I want to struggle, I want to live, I want to defy heaven! After all the hard work to gain a foothold in the door, he found that his body in the original world was not dead? No, I want to go back, I want to go to work, I want to be lucky! The end of the world in 2012? Reincarnators, reborns, time travelers... Are they all extraterrestrial demons? Is my world demonized? Will the world we traveled through also be demonized? No, I want to fight, I want to struggle, I want to defy heaven! What? You say that I am an extraterrestrial demon and it is my mission to demonize the world? Okay, I'll lie down, whatever you want.