shanghai escort also offer a romantic massage for rmb 800,- for 2 hours, so could be it is what you are looking for ;-). seems they share at least the hotline with shanghai massage.
link: Shanghai Escort
phone: 15121111516
warning: till now, Shanghai Nightlife Guide did not check the service,
and also no customer till now recommand it, so be carefull. If you have experience with the agency, please leave a comment.
