Parents fear that a decision by health authorities in Xi'an, Shaanxi province, allowing middle schools to sell condoms on campus will promote teenage sex. The move has been made to curb an increase in HIV/AIDS cases.

"The decision was made by the provincial government after in-depth research and careful studies," said Ma Guanghui, director of the Shaanxi provincial health and family planning committee's disease control office.

China has seen an increase in the number of HIV/AIDS cases among people aged 15 to 24 in recent years.