The only son in the Gu family who studied abroad and became head of surgery at a capital hospital. He fell in love at first sight with Gu Shen's mother and married across social classes. His anatomical textbooks were falsely labeled as banned books. He faced criticism and struggle sessions, lost his health from false accusations and imprisonment, and died before a verdict could come. Before dying, he publicly severed his father-son relationship with Gu Shen.