Inclusion Criteria:  Hong Kong Chinese over the age of 17 Had smoked at least one cigarette per day over the previous three months Had been diagnosed with at least one chronic disease Able to speak Cantonese and read Chinese Willing to take action to improve their health but had no intention to quit smoking Had a smartphone and were able to use mobile instant messaging tools Willing to receive health promotion advice and communicate through mobile instant messaging  Exclusion Criteria:  Participating in other smoking cessation programs or services With mental or cognitive impairment or communication problems