Chen Jinghuan, Gao Ping, Zhao Gangqiang, Gungun. Chen Jinghuan: Deputy Chief of the Fourth Brigade of the Traffic Police Detachment of Huaibei Public Security Bureau. Gao Ping (female): Captain of the Second Brigade of the Special Police Detachment of Huaibei Public Security Bureau. Zhao Gangqiang: Deputy Chief of the 1st Brigade of the Traffic Police Detachment of Huaibei Public Security Bureau. Rolling: Deputy Chief of the 1st Brigade of the Traffic Police Detachment of Huaibei Public Security Bureau.