Modern logistics queen Su Wan time-travels to become a deposed empress, exiled to Hancheng in the northern border. Starting with ten old horses, she builds Hancheng Express, reconstructing the empire's logistics with an abacus and a blue flag. Waybill pledging, post station franchising, counting house data, IOU credit—every step is calculated. She defeats Lu Yunzhou, incorporates mountain bandits, enters the capital to see the Emperor, and refutes all civil and military officials with data. Entrusted by the late emperor with an imperial edict conferring upon her the post of Regent and State-Monitoring Envoy in charge of national logistics and deciding military and state affairs, she builds a country-encircling express road, promotes standardization, cuts off the Northern Di's supply chain, and forces back two hundred thousand iron cavalry without dispatching a single soldier or private. Finally, land routes are connected, sea routes are opened, and she leads an ocean-going fleet toward the East China Sea blockaded by the Seven Nations Commercial Alliance.