If you're in China and are having finding prostitutes, you haven't either walked through you hotel lobby, onto a main shopping street, or really been anywhere. They are quite literally everywhere in the cities and larger towns.

I can not think of a single day, except deep in the mountainous countryside, where I have not been approached by women selling themselves, or guys trying to sell me 'sexy lady massage'. Even in the mountains we're seen roadside brothels.

If the search feature was to find quality prostitutes, then that's quite probably another issue and for some a positive development.