In the country section "China" on and off some reports tell about very poor experiences with
girls, ladys whatever found on those general sites like "expatchn" or "xxxmassageyyy":
Be aware those pictures all (99.9%) are fakes !!
Better rely on those reports given here with positive
feedback, but double check about who is the reviewer (any other reports from websites other than those
general ones...)
One site I can recommend for Shanghai is "shanghai-nightlife-guide.com":
The section "independent escorts" lists pretty reliable information and positive experiences
in Beijing I can PM my contacts or experiences.
Other places you are on your own... check the internet for informations. In any case
check pictures using "tineye" or equivalent