In 1992, Shanghai Social Security Consultancy, the first of its kind in China initiated by Duanmu Hongyu (a senior criminologist), etc., was established in Shanghai.

• 1992年，我国第一家私家侦探服务机构“上海社会安全咨询事务所”在上海成立，以端木宏屿为代表的几名资深刑侦专家首创的私家侦探机构，由于公安部发文规定禁止设立私人侦探公司。