The primary outcome of the study is to measure participated smokers' self-reported 7-day point prevalence quit rate at 26 and 52 weeks follow-ups. The secondary outcomes include participated smokers' (i) self-reported reduction rate at 26 and 52 weeks follow-ups; (ii) self-reported quit attempt at 26 and 52 weeks follow-ups; (iii) knowledge enhancement rate towards smoking cessation at 26 and 52 weeks follow-ups compared with baseline; (iv) change in self-efficacy towards smoking cessation at 26 and 52 weeks follow-ups compared with baseline.