The study is designed to have two interventions targeting physicians and patients respectively. Only one community healthcare center will receive the intervention and the intervention period is designed to be 12 weeks. The Fudan and Hainan research team will be responsible for recruiting physicians and each physician will recruit MI patients to participate in the study. Physicians play dual role in this study: 1) as subjects who will use the app to prescribe medications and 2) as collaborators who will help recruit patients and collect their baseline data. The DKU research team will train the physicians how to use the app before they start to recruit patients.