http://edition.cnn.com/2017/03/08/health/china-sex-education-textbook-children/index.html
In a closed country, it won't be a problem, even when there is no public education for sex. That's because few people enter the country, and few people bring HIV/AIDS into the country.
But, in the country, where rapid development triggered more and more foreigners to come to the nation, there would be more and more HIV/AIDS patients bring virus there. People's Republic of China is the typical country like that.
So, it's public agency's responsibility to take measures to keep youngsters away from AIDS. The mother in Hangzhou ,who criticized drawings of the sex textbook should learn the current situation of her country ,and should think about how to protect children from 'realistic danger', instead of forcing children to obey 'her emotional criticism'.
