Textbooks use images, in addition to text, for delivering knowledge, thereby convey attitudes and values of students including those on gender bias. The gender bias presented in textbook images affects in subtle ways the students' learning outcomes, career choices, and how they perceive science. However, prior research has relied on explicit…

China boasts one of the largest adolescent populations in the world, with 165 million in total (United Nations, 2017). In recent decades, Chinese adolescents have reached sexual maturity at increasingly early ages, and more and more young people in China are open to premarital sex while at the same time they general lack sexual and reproductive…