Was recently in China and decided to do some homework to pre-arrange my entertainement for the evenings.
Searching this site was not too useful but Google was.
I checked out http://www.escortschina.com/ and the girls seem legitimate but I did not pursue as I was able to get it for free.
I also found two sites where you can place ads. The first one - http://www.chinesekisses.de - did not produce any results. I did not contact any of the ladies but posted a profile including a picture (I figured nobody knows me there!). No rsponse after four days. Deleted my profile to focus on this next site that was keeping me very busy.
The other site - http://shanghai.asiaxpat.com/ - was amazing! I placed an ad (note that you have to pick the city) which included a picture. I was contacted by over 25 ladies who wanted to meet with me. I chatted with many of them on MSN to figure out the best prospects. The trick is not to be too agressive, too obvious. You go slow to put them at ease and eventually you introduce the fact that you enjoy kissing and see their reaction. If they appear interested in the kissing part you know you'll get it all. So you weed out the not so good looking ones and those who really just want to be tourist guides and improve their english. I ended up with more girls than I had evenings available. Most are the girl next door type. Typically secretaries that have internet access at the office. Age does not bother them. As I look young I told them I was 45 (I really am over 50). All the girls except one were below 30.
I think that the fact that I posted a picture (I deleted the ad after 3 days due to the high response rate) made a big difference. If you are reasonnable handsome you will generate a lot of interest. You also need to invest some time on MSN. I had to built a speadsheet to keep track of who was who! The chinese girls really like the western guys. They find us "romantic". They also like our superior equipment (;-) ) In half the cases, the girls stayed overnight.
On a different front, coming out of my hotel in Shanghai I was approached by a young girl offering a massage. After turning her down she then proposed sex. I asked for her price. 900RMB ($125) was her opening bid. I am sure she would have gone for a third of that but i did not pursue.
So in the end, if you don't get laid every night, there is something wrong with you!!!
Hope this helps. This place is a candy shop!!!