Ye Haiyan, left, with dissident photojournalist Du Bin in Hong Kong

Ye Haiyan, left, with dissident photojournalist Du Bin in Hong Kong

Sex worker advocate Ye Haiyan has been barred from leaving China to attend the World AIDS Summit.  This is not the first time Haiyan has been persecuted by the government in her decade of sex work activism, but it is part of a new and larger crackdown against sex work.