Effectiveness of a Chatbot Intervention in Promoting HIV Self-Testing Among Men Who Have Sex With Men(MSM): a Randomized Controlled Trial

INTERVENTION: Intervention group:Chatbot‐based HIVST support + provision of HIVST kits;Control group:Provision of HIVST educational materials + provision of HIVST kits; CONDITION: Human Immunodeficiency Virus Infection PRIMARY OUTCOME: HIVST uptake; SECONDARY OUTCOME: Risky sexual behavior characteristics;HIV Self‐Testing Information‐Motivation‐Behavioral Skills Model Scale Score; INCLUSION CRITERIA: 1.Biologically male and aged 18 years or older. 2.Self‐reported anal intercourse with a male partner within the past 6 months. 3.HIV‐negative or unknown HIV serostatus. 4.Able to use a smartphone and possesses an independent WeChat account. 5.Demonstrates basic digital literacy. 6.Understands the study objectives and procedures, voluntarily agrees to participate, and provides written informed consent. 7. Not currently participating in any other vaccine health education programmes