Zombie Apocalypse: I Am Farming Monsters in the Safe Zone

Black rain falls, zombies besiege the city, lives are played on the roulette wheel, and 90% of human beings become monster rations. Lin Mo, an engineering technician, is bound to the [Hongmeng Safe Zone] and has an invincible domain. While others gambled on roulette for their lives, he farmed land, opened factories, and built mechas in the safe zone. While others were being chased and killed by zombies, he expanded the safe zone into a steel fortress and used Star Destroyer Cannons to blast the Roulette Master to pieces. Build walls high, accumulate food widely, and I will be king in the end of the world, starting from a 10-square-meter safe zone!