1973 participated in public security work, engineer. Participated in more than 2,000 cases of trace identification of major cases, guided the detection of more than 500 cases of homicide, and there was no wrong case. The "Comprehensive Technical System of Public Security Command Center" and "Large-capacity Automatic Fingerprint Identification System" developed by the Ministry of Public Security won the second prize of scientific and technological progress respectively. Changzhou Public Security "Optical Fiber Network" and "Integrated Information System" which are responsible for the construction have played an important role in the real struggle, saving 5 million yuan for the country every year. He edited The Mystery of Fingerprint, which is a complete collection of criminal technology, dactylography and fingerprints without lies. He was employed as a visiting professor at China Criminal Police College and China Public Security University.

Liu Pingping, male, 1952, born in February, 65438, party member of the Communist Party of China, bachelor degree, third-class sheriff, senior engineer of trace inspection. 1969 joined the army after graduating from junior high school. 1973 Demobilized into the police and participated in public security work. 1976 served as deputy section chief of five departments of Changzhou Public Security Bureau, 1985 served as deputy director of Changzhou Public Security Bureau, and in 2008 served as director of Changzhou Emergency Office.