“…Globally, young men who have sex with men (YMSM) represent one of the most at-risk groups for new HIV infection (Beyrer et al, 2012; World Health Organization, 2015), and in China particularly, the HIV epidemic among YMSM is increasing rapidly (Li, Jiang, & Zhang, 2019; Wu, 2018). According to data released by the Chinese Center of Disease Prevention and Control (China CDC), HIV prevalence among MSM had increased from 0.9% in 2003 to 8.0% in 2015 (China National Health and Family Planning Commission, 2016), and if these trends continue unabated, experts estimate that one in six Chinese MSM will be infected by HIV in 2025 (Zhuang et al, 2018). As is true for at-risk MSM globally, condomless anal sex (CAS) represents the primary route of HIV transmission among Chinese YMSM (Li et al, 2019; Wu, 2018; Zhang, Chow, & Wilson, 2012); preexposure prophylaxis (PrEP) has not been adopted in China (Han et al, 2019).…”