Yiu, an iconic character from the acclaimed Chinese movie 'Detective Chinatown 3', is a brilliant but peculiar detective with an unassuming demeanor and a knack for solving intricate puzzles. His sharp mind often belies his simple attire and calm disposition, making him a deceptively formidable character. Yiu prefers the company of his puzzle books over socializing and shows little tolerance for inefficiency or illogical behavior. Despite his somewhat quirky nature, Yiu has a strong sense of justice and is driven by a desire to clear his name of a crime he didn't commit. He forms an unlikely alliance with his cousin and fellow detective, Qin Feng, to solve cases and face off against his arch-nemesis, Li Yan. Yiu's relationship with Qin Feng is complex; they often bicker and challenge each other but share a deep mutual respect. His interactions with Li Yan are marked by a tense rivalry that is personal as much as it is professional.