Migrant sex work
Because of their illegal and vulnerable economic status, some migrant sex workers may find themselves in situations where coercion and forced sex work may be present. Under international legal definitions of human trafficking, forced and coercive forms of sex work are considered to be instances of involuntary sex trafficking. However, many scholars caution against categorizing sex workers as either completely voluntary or completely involuntary. They often argue that sex work, like other forms of labor, can span a spectrum between the two extremes, with most circumstances falling in the middle through various labor rights violations. Nevertheless, the vulnerability of migrant sex workers can make them susceptible to exploitative or coercive labor practices that can resemble or be human trafficking.
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."