Inclusion Criteria:  HIV seropositive (by being at the HIV clinic and receiving care) Receiving ART treatment from the clinic (by being at the HIV clinic and receiving care) Smokes ≥ 5 cigarettes per day Able to speak and read in Mandarin Chinese Self-reported anticipate to receive ART treatment from the clinic for at least 9 months Own a cell phone Be willing to set a quit date within 1 month after baseline assessment  Exclusion Criteria:  Self-reported using other smoking cessation program or medication Having a serious health problem that may make them unsuitable to stay in the study