Thirteen-year-old Jie, pictured in yellow, lives in Wen’s parent's home on the top of a mountain in a village called Tangzibian
According to Muyi Xiao, the girls are also eager to tie the knot earlier fearing an arranged marriage to a man of their parents choosing - instead of their own - if they don't settle down fast enough.
Aside from the obvious difficulties of marrying and giving birth so young, the impact of the children 'left behind' as their parents migrate to cities for work is yet unknown.
Once they have given birth, the couple are often forced to move to earn money - where the hours and accommodation are unsuitable for a newborn and so leave them with their grandparents in the village.
16-year-old Xiao Xin watches cartoons with her one-year-old daughter in Guangdong village. She started dating her husband when they were both in 5th grade, but dropped out of school after getting married in 2013