Available as both manhwa and novel.
I Have a Mansion in the Post-apocalyptic World
Also known as: Wo Zai Moshi You Taofang · I Have a Mansion in the Post-Apocalyptic World · 我在末世有套房 · I have a suite in the last days · 이 말세의 구세주, 나란 남자 · I Have a Suite in the End Times · I've Got a House In The Last Phase
Jiang Chen crossed into the judgment day after the nuclear war, and there was a mess everywhere. In order to survive, Jiang Chen led the refugees to establish a base area and set up a federation. Then carry the judgment day's technology and return to the true world. Change the political structure of the earth, rescue the world in a critical moment, and establish the Great Union of Earth Federation! Expanding the territory and fighting the threat from the sky.