<qa>  What is the third step of the intervention?Third step: MEMS will be used in the intervention to monitoring patients medication adherence. As a monitoring instrument, MEMS Aardex, Zurich, Switzerland is a plastic container with a spring-loaded device in the cap. Each time the bottles is opened for at least 3 seconds, the time and date of opening are recorded and saved. Based on the research data and the HbA1c improvement, this study will analyze the other factors which affect the patients adherence to medication. Meanwhile, the investigators will collect patients information such as blood pressure, biochemical index, complications related to diabetes, life quality, self-management, life style, health behavior, medications, health expenditure so as to evaluate the affect of incentive strategy on the adherence to medication among patients with type 2 diabetes. 