Prostitution in Hong Kong is itself legal, but organised prostitution is illegal, as there are laws against keeping a vice establishment, causing or procuring another to be a prostitute, living on the prostitution of others, or public solicitation.[1]

The most visible public venues for sex workers in Hong Kong, especially for tourists, are massage parlours and the so-called Japanese style night clubs. However, most of the commercial sex worker industry consists of women working in small, usually one room apartments, usually referred to as one-woman brothels, the equivalent of the walk-up brothel in the United Kingdom. They advertise for clients through the Internet and local classifieds. Most popular mainstream newspapers will carry such classifieds with brothel guides as an insert within racing form guides. Yellow neon advertising boxes were used to advertise sexual services to such an extent that yellow (黃) became synonymous with prostitution.[citation needed]

source: Wikipedia