The study's subject inclusion criteria will be:  Chinese adults with coronary cardiac risk factors (at least two from iv ); those able to perform a brisk walking exercise; and those who possess a smart phone and are able to use it.  Coronary heart disease risk factors:  current regular smoker, over 50 years of age; has a medical diagnosis of diabetes or hypertension; has a family history of ischaemic heart disease or hyperlipaemia ; has hyperlipidaemia or is regularly taking drugs for hyperlipidaemia; is obese (BMI>25); has had a Percutaneous Coronary Intervention performed; was diagnosed with stable angina and prescribed with Trinitroglycerin (TNG) drugs.  The exclusion criteria will be those :  with mental, visual, hearing, or cognitive impairments as a result of which they are unable to perform a brisk walking exercise or communicate using a smart phone; on a waiting list for cardiac angiography within 6 months, and has medical diagnosis of unstable angina.