Gu Shunzhang, born Gu Fengming was an early leader, spymaster, and defector of the Chinese Communist Party (CCP). Sent to Soviet Russia to train in espionage, Gu was chosen by Zhou Enlai to lead the CCP's first intelligence service, the Central Special Branch. After he was captured by the Kuomintang (KMT), Gu defected and revealed to the KMT intelligence all he knew of Zhou Enlai's underground communist spy network earning him a reputation as "the most dangerous traitor in the history of the CCP."