Qualitative research methods will be used to obtain feedback from both the providers and the patients on the physician app and the short messaging system (SMS). To assess whether the intervention is implemented as planned and to gain their user feedback, the DKU, Fudan and Hainan research team will conduct phone and face-to-face interviews respectively in the middle and at the end of the intervention. All questions will be open-ended allowing participants to raise important issues even if they are not covered in our original topic guide. Four physicians and eight patients (two from each physician) will be invited to participate in the process evaluation interview. The mid-term evaluation (between 4-6 weeks after the intervention begins) are all one-on-one in-depth interviews. The final-term evaluation will consist of one focus group discussion among the four physicians and individual interviews to patients.