Lin Ziyi, a doctor of modern chemistry, traveled back in time to the Kaiyuan period of the Tang Dynasty. He was trapped in a slum in Xicheng, Chang'an. When he was penniless, hungry and cold, he relied on modern scientific knowledge to "investigate things to gain knowledge" and used strange techniques such as vinegar to mend pottery, salt water to distinguish rice, and drawing silk from bottles to survive. From repairing broken cans to doing street tricks, he was repeatedly blackmailed by gangsters, but he managed to solve the porcelain scam and finally caught the attention of the county captain Du Ming. In Chang'an, where power and business are intertwined, he uses scientific wisdom to overcome the difficulties of the times, finds a way to survive in the investigation of objects, seeks dignity in troubled times, and embarks on a journey of wisdom and counterattack that spans a thousand years.
