Extremely Cold Apocalypse: Start with a Safe House

The end of the extreme cold is coming, and mankind is facing an unprecedented crisis. In his previous life, Lin Dong died tragically because he took in his childhood sweetheart's family. Reborn and returned to the day before the end of the world, Lin Dong received a safe house as a reward from the system! Brother Dong, I want to repay the insult twice as much!