Prof. Si is in charge of the psycho-cardiological out-patient clinic which is the first “heart and mind” special clinic of northwest China. He has diagnosed and treated over 6,000 psycho-cardiological patients successfully. His medical skills and service attitudes has gained unanimous approval and praise. He held public lectures more than 130 times and psycho-cardiological skill training course four times for free. Totally more than 4,000 doctors participated and benefited. At least 5 psycho-cardiological out-patient clinics established with his assistance. He established the first database of psycho-cardiological patients and the first one who translated and published book of psycho-cardiological area.

He is postdoc of University of Arizona, USA. He published 17 articles with the highest IF:12. He has won 4 national funds and 3 national patents. He is the first one who established psycho-cardiological lesson toward medical college students and graduate students. He is reviewer of Heart Journal. Deputy team leader of group of psycho-cardiological Science, Shaanxi Health Care Society.