On the afternoon of May 14, 2020, the Retirement Office of Xi Municipal Public Security Bureau organized more than 30 retired cadres, including Cao Cunyu, Ping Liu and Wu Jinbiao, to visit and guide the Changan Branch of the Public Security Bureau. So I retired.

Public security bureau is the organizational form of public security organs and the functional department of the government in charge of public security work. Public security bureaus are usually divided into: municipal public security bureau, provincial capital city public security bureau, prefecture-level city public security bureau and county-level public security bureau. In addition to county-level public security bureaus, the first few can be divided into sub-bureaus according to urban areas. The specific public security bureau is generally led by the local government and guided by the superior public security department, department and bureau. The highest department of the public security organs is the Ministry of Public Security, which guides public security work throughout the country, including public security bureaus at all levels. Under the dual leadership of the local government and the public security organs at higher levels.