My comment:
(a) I am unfamiliar with Hong Kong, never having been there. So I did not know what it means hwne this report states, "香港社会对[香港性工作者维权组织] 紫藤工作室是认可的，她们可以合法设立办公室并积极展开工作。在香港，有居民身份的性工作者单独可以展开工作，' 接待客人，所谓一楼一凤是合法的."
(b) prostitution in Hong Kong http://en.wikipedia.org/wiki/Prostitution_in_Hong_Kong
(Prostitution in Hong Kong is itself legal, but organized prostitution is illegal, as there are laws against keeping a vice establishment (brothel), causing or procuring another to be a prostitute, living on the prostitution of others, or public solicitation)