That was the limit of her formal sex education. For millions of young Chinese people, it's more than they ever got.
As China marks World AIDS Day Thursday, the effects of that missing knowledge is more evident than ever, with growing numbers of HIV infections and staggeringly high abortion rates.
In 2015, there were 115,000 new HIV infections in China, according to China's National Center for STD/AIDS Prevention and Control. Of those, 17,000, or 14.7%, were in the 15-24 age group.