Many Children and Many Blessings in the Last Days: Traveling Back and Forth to Ancient Times in Exchange for Supplies

Step by step from novice to big boss, Doomsday safe house? There's no need. Wherever I, Li Haoyu, am, is a safe house! Rebirth of supplies? Impossible, there are so many regret medicines in the world! Bring all kinds of good things from ancient times and the last days. [The end of the world + time travel + not the Virgin + many beauties + fantasy + space + hegemony + overhead] Li Haoyu is a programmer on Blue Star. He was laid off at the beginning and abandoned by his girlfriend. Accidentally acquired the apocalyptic reproduction system. The system requires that the protagonist must save the civilizations of two planets. [The resources of the two planets are complementary] [Blue Star] A planet is a modern civilized planet where the protagonist lives. In the era of hot weapons, technology is advanced, and the end of the world is approaching. Blue Star has an outbreak of zombies, polluted soil and water resources, and is not suitable for human survival. [Green Star] A planet is a planet of ancient civilization. In the era of cold weapons and ignorant ideas, various countries on this planet are fighting in a melee. The number of humans has decreased sharply and is about to be invaded by barbarians. In order to continue human civilization, the protagonist must reproduce a lot in order to obtain system rewards, defeat monsters and upgrade, and continue the human civilization of Blue Star and Green Star.