Testing Different Anti-smoking Messages Among Chinese Young Adult Smokers and Nonsmokers

In this study, the investigators will examine the effectiveness of different anti-smoking themes in reducing intention to smoke among Chines young adults. The study will recruit 1500 adults aged 18-25 years old, including 750 current smokers and 750 non-smokers, evenly split between male and female. The study will be conducted through a self-administered, web-assisted online survey software. Participants will be asked to consent to participate in this study via a consent form presented at the beginning of the survey. Consented participants will be randomized to one of six conditions (each represents a level of the independent variable: anti-smoking message theme): 1) Health effects 2) Tobacco industry manipulation 3) Mental health 4) Secondhand smoke 5) Social acceptability 6) Control messages with no cigarette-related content. The study has two sessions. In session 1, participants will complete a 20-minute survey. The survey will begin with questions assessing demographic characteristics. Then participants will be shown intervention or control messages (watch three 30-second video in each condition), and beliefs and future intention to smoke cigarettes will be assessed. Two weeks after session 1, participants will be asked to complete a 5-minute survey in session 2 of the study. The survey will measure participants' recall of the messages and smoking behaviors in the past two weeks after message exposure.