With a Million Mechas Produced Every Day, My Empire Is Invincible

[Technology + Fantasy + Maid + Black Silk + Hip-covering Skirt] Xia Zheng, who had traveled through time, had just awakened his system and encountered the Zerg Rider. What, my people are all their slaves? How can you tolerate eating people when you can't feed them enough? The Empire's elite soldiers are in production... Scorpion Warrior: Ta-ta-ta... Air and space fighter: beep beep beep... In order to survive, Xia Zheng started a series of technological roads. Many years later, Xia Zheng had millions of stars and a fleet of hundreds of millions of mechas behind him. Looking across the universe, who dared to fight?