Jia Dai, formerly known as Ren Jiazhong, is the eldest brother in Beijing, and Zhang Baolin is the leader of the underworld somewhere in Shijiazhuang. They were social friends and were later imprisoned for being involved in a shooting.
Zhang Baolin, the prototype of Liu Huaqiang in the TV series Conquest, is the boss of a certain underworld in Shijiazhuang. He was arrested and shot in Shijiazhuang according to law, and died in 2003. His younger brother Zhang Baoyi was also involved in the shooting.