My Supermarket Connects to Ten Thousand Worlds, and Turning It Over to the State Feels Amazing

Shen Nuoxi thought her life was over when she took over a bankrupt shell of a supermarket after the previous owner ran off. While cursing up a storm, she actually activated the [Myriad Worlds Store] System. The rundown shop connected straight to the front lines of a war in 194X! From the start, she traded unsold brown sugar for soldiers' broken guns. What a steal! Then the enemy tried to shop for free? Not a chance! The shop's rules: Hit me? I'll hit back twice as hard! Steal something? I'll strip you bare. You won't even get to keep your loincloth! "You beggars! Save that fabric for your emperor's burial clothes!" When it comes to sharp-tongued insults, I'm a professional. Once she exchanged the "spoils" she'd stripped off them, the shop leveled up in a flash! Running water, electricity, and internet! The mall unlocked! White sugar, salt, first-aid kits... Modern-day junk is hard currency here! And so... While other people transmigrate into wartime and risk their lives, I run a safe house and make a killing as a trader. Sell goods? Beat up the Japanese devils? Help the most beloved people? I'm Shen Nuoxi, and I'm opening this "Anti-Japanese War theme park" come hell or high water! P.S. Zhou Bapi, you former boss, you ran off with the money, right? Just watch me turn this shop into a chain across the myriad worlds!