It was rumored that in a place of Nanjing, people could bind or even deal with one or several female models in a completely private space by paying hundreds of yuan. After 3-month undercover visits by many reporters, it turned out that the Nanjing underground studio was actually a "地下囚牢" involving sexual abuse! And such a place had existed for several years, full of sexual violence, SM sexual abuse and other elements. These behaviors were simply outrageous!