Opening a Supermarket on the Long March, I Empty the Enemy's Warehouses

[Strong female lead + no romance + cheat powers + don’t read too much into it] After her older brother bound himself to a System and disappeared, Meng Xiwang was chosen by the System too, becoming a supermarket manager. She decides to open a supermarket along the Long March route, change the nation’s fate, and bring her brother home. The soldiers and civilians lack clothes and food. How can they survive the winter? The Red Army is short on medicine, with limited medical care. How can they perform surgery? Without penicillin or antibiotics, how can the soldiers survive infection? The Japanese launch encirclement campaigns and sweeping raids. The Red Army has no ammunition to break through, suffering heavy casualties. … Meng Xiwang explains that any goods connected to national hatred and vengeance can be uploaded to the System in exchange for supplies. A battered tobacco pipe? [Rice, flour, pork, ration biscuits, instant noodles, fresh vegetables, ham sausages…] A bloodstained military cap? [Antibiotics, sterile gauze, anesthetics, painkillers, blood packs, surgical instruments…] A medal blown apart on one side? [Bullets, sniper rifles, submachine guns, tanks, planes, anti-aircraft guns…] A military uniform riddled with bullet holes? [Bulletproof vests, shields, navigation systems to give you cheat powers…] The System says, “Is this really a war of resistance? You’re rebuilding the country! You’ve cleaned out the supermarket’s entire stock.” Meng Xiwang replies, “So what if it’s empty? We’ll livestream a supply drive and keep fighting!” Who wouldn’t want the country to prosper and its people to thrive? Everyone online, chip in a yuan, and let’s defeat every invader!