Participants
RECRUITMENT
Process evaluation was conducted alongside an ongoing open-label, parallel-group randomized controlled trial (RCT) in the HIV clinic in Guangzhou Eighth People’s Hospital in Guangzhou, China. Participants were recruited from March 19, 2019, to January 13, 2020. Eligible participants (1) were HIV-positive MSM aged ≥18 years, (2) had planned to initiate ART on the day of recruitment, and (3) had access to a personal smartphone and a private WeChat account to receive follow-up questionnaire links and the app-based intervention for the intervention group. More details regarding the recruitment procedure are described in a published protocol [