In 619, he and Pei Ji were in charge of interrogating one of the major initial contributors to Emperor Gaozu, Liu Wenjing, who had been arrested on suspicion of treason. Both he and Li Gang (), as well as Li Shimin, tried to intercede on Liu's behalf, but Emperor Gaozu nevertheless executed Liu on Pei's recommendations.
During 619, Pei Ji and the narrator were in charge of questioning a key figure who had initially supported Emperor Gaozu, Liu Wenjing, who was arrested on suspicion of betrayal. Both the narrator and Li Gang, along with Li Shimin, tried to advocate for Liu's release, but Emperor Gaozu ultimately decided to execute him despite their efforts.