Why did the man's "service fee" for using a small card mobile phone cost about 400 yuan instead of 3,000 yuan?

According to the police, at the end of March 2017, the man Zhang Qing came to Shanghai on a business trip. After finishing his work during the day, he returned to the hotel room and found a small card thrust through the door, with a photo of a young girl, provocative words, and a phone number printed on it.

He dialed the number on the card. "The other party said that they can provide full service for 400 yuan." Zhang Qing recalled that he readily agreed. About an hour and a half later, Chen Lian came to his room and asked for payment in advance. Zhang Qing handed her 400 yuan.

After paying the money, Chen Lian made a phone call and handed the phone to Zhang Qing. "There was a man on the other end of the phone. The man said that 400 yuan was just an introduction fee and 3,000 yuan was a service fee." Zhang Qing said that the man on the other end of the phone also told him clearly that someone was watching the wind downstairs. If he did not pay the money, several brothers of the watchman would come up to deal with him. At this time, Zhang Qing realized the seriousness of the problem and wanted to call the police with his mobile phone. Seeing this scene, Chen Lian rushed out of the door and left.

The Paper reporter learned from the Pudong police that after receiving the call, the police realized that this might be an organized "Xianrentiao" gang. Subsequently, based on the victim's description, the police began to visit and investigate. Finally, a "Xianrentiao" gang consisting of Chen Lian and others who often hang out in budget hotels along Qixia Road and Weifang Road surfaced.

After grasping the basic situation and crime patterns of the gang, in the early morning of May 10, the Lujiazui Branch Headquarters of the Pudong Public Security Bureau, together with the Tangqiao and Weifang Xincun Police Stations, launched a centralized operation to close the network. ****, More than 20 suspects were arrested.

After interrogation, Chen Lian and others confessed to the crime of organizing others to engage in prostitution by distributing small advertisements in nearby budget hotels to solicit prostitutes, and at the same time using phone calls or door-to-door threats to extort money from prostitutes. At present, Pudong police have identified 5 related cases and criminally detained 15 people, including 4 people responsible for prostitution and prostitution, 4 people responsible for organizing and organizing, 4 people responsible for issuing promotional cards, and 3 people responsible for pick-up stations.

After Chen Lian arrived at the case, she confessed that she had come to Shanghai to work as a prostitute in 2014, and "came to Shanghai again in March this year, working with the same boss." However, her working hours were not fixed. Call me, and a car will pick me up. After I finish, the boss will call me, and the boss will ask the customer for a service fee, which ranges from a few hundred to a thousand."