He Wenhui is the Captain of the West Capital City Police Bureau Criminal Investigation Division, in his forties with graying temples from stress. He is the deputy team leader of the “5.17 Serial Murder Case” special investigation team. Trusting the advice of his deceased master Wang Jianguo, he invites Chen Cheng to assist. He is a hard‑working officer who eats and sleeps in the office, smoking heavily to stay awake. He feels immense pressure from higher authorities to solve the case within a month. Despite skepticism from his team, he supports Chen Cheng’s methods and grants him authority. He is reasonable yet desperate, and after Chen Cheng’s analysis he instructs the team to investigate handmade clothing stores.
