Prostitution law
However, sex worker activists and organizations distinguish between human trafficking and legitimate sex work, and assert the importance of recognizing that trafficking is not synonymous with sex work. The Sex Workers Alliance Ireland organization explains: "victims of human trafficking may be forced to work in industries such as agriculture, domestic service as well as the sex industry. It is critical to distinguish human trafficking, which is a violation of human rights, from voluntary migration." The Open Society Foundations organization states: "sex work is done by consenting adults, where the act of selling or buying sexual services is not a violation of human rights. In fact, sex workers are natural allies in the fight against trafficking. The UNAIDS Guidance Note on HIV and Sex Work recognizes that sex worker organizations are best positioned to refer people who are victims of trafficking to appropriate services."
Human trafficking in China
The problem of sex trafficking stems from the gender imbalance present in China. Women are most likely sold into provinces like Henan in which the gender imbalance is particularly stark and where there is a high demand for women. Often, men kidnap the women after enticing them with promises of employment and money, but later sell them to villages and other provinces. Trafficked women are often then forced into marriage and therefore suffer from prolonged sexual exploitation. Particularly, according to the article on "Human Trafficking and Smuggling in China" by Cindy Chu, trafficked women were usually aged between 20 and 50 in the past, but "recently most of them were under 20 and some were girls as young as 12 years old."