When a freak accident hurls Li Wei a thousand years into China's past, this modern-day salesman finds himself trapped in the Song Dynasty with only his wits and a smartphone he can't charge. But Li Wei has an ace up his sleeve: an offline AI assistant that might just be his key to survival. As he navigates court intrigues and ancient customs, Li Wei must learn to wield his futuristic knowledge without revealing its source. With each AI-assisted decision potentially altering history, he faces a constant dilemma: use the technology to thrive in this unfamiliar world, or preserve the past at the cost of his future? In a land where innovation could be seen as sorcery, Li Wei walks a dangerous line between two worlds, where one wrong move could change the course of history—or erase him from it entirely.