Night Wanderer, Ice City's Underworld King

Protagonist: Chen Sanshan, a modern veteran and international mercenary whose soul travels back in time to 1937, where he becomes a low-ranking logistics clerk at the police bureau in Bingcheng and an agent for the Fuxing Society. Spy System: Provides fragments of crucial future intelligence, instills spycraft skills, and supplies scarce goods such as medicine, money, and novel gadgets. He also has a portable pocket dimension, small at first but upgradeable and expandable as he completes missions. A gritty espionage story set against real historical events, focused on contests of wit and courage and struggles of conscience, with passionate romance and the rise of a powerful figure woven in.