Families of gay men and women in China have expressed their anger at a sex education booklet given to parents of teenagers that describes homosexuality as a type of "sexual deviance".
About 50,000 copies of Parents, Please Walk Your Children Through Puberty have been distributed in Hangzhou, capital of Zhejiang province, since last year.
The book is designed to aid parents whose children are going through adolescence. It was jointly published by the Hangzhou Institute for Educational Research and Northeast Normal University Press.
But parents of gay children have complained about the booklet describing homosexuality as a type of "sexual deviance" and calling on parents to "prevent" it. One passage in the book reads: "Because homosexuals are not accepted by prevailing social customs and moral standards, they tend to be anti-social and eccentric."