In 1992, Shanghai established the first private investigation agency in China: "Shanghai Social Security Consulting and Investigation Office". A year later, the Ministry of Public Security issued a document prohibiting the establishment of private investigation agencies, and this institution has since been abolished. On March 1, 1993, the private investigation agency: "Chengdu Cooperative Affairs Investigation Institute" was born...

People's attitudes towards extramarital affairs can be seen from the following titles: adultery - third party - extramarital affairs. The term "adultery" not only has an obvious derogatory connotation, but is also considered a crime at a certain time. And "extramarital affairs" is obviously a neutral word, and it will even be because of some special colors...