Participants will be invited to recall their smoking status and tobacco-related KAP. Smokers need to identify their smoking cessation behavior.
First part: participants need to finish the questionnaire, which includes the demographic information sheet, characteristics of smoking sheet, and tobacco-related KAP. Including (a) patients' knowledge of health risks of tobacco and tobacco-related diseases (the delphi method was used to construct this knowledge questionnaire); and (b) perceptions of tobacco harm.
Second part: smokers need to finish the questionnaire, which includes history of smoking cessation sheet, attitudes towards tobacco control smoking cessation, nicotine dependence sheet, tobacco withdrawal symptoms sheet, intention to quit smoking sheet, ability to quit smoking sheet, alcohol use disorders and physical activity.
