Doomsday Development Plan

[System + apocalypse + cultivation + science fiction] Xu Tian, who was adopted since childhood, suddenly lost his parents, and met his adoptive father and younger brother who competed with him for his property. After the family relationship is gone, the system is blessed, but the system is a bit arrogant and has to be served? He thought that having the system would help him turn around and beat his second uncle's family in the face, but the system told him that the end was coming and he had to build a shelter quickly. The most difficult thing in the apocalypse is not only survival, but also human nature. How did Xu Tian grow from an ignorant college student to a strong man who dominates the apocalypse!