Coordinators are requested to consecutively register 5 variables regarding basic information of patients undergoing isolated or combined CABG and/or valve surgery in their hospital in 3 days after the surgery. The basic information includes name, sex, date of birth, type of surgery and ID number. The investigators request the coordinators to submit the complete in-hospital data within 28 days after the surgery. The investigators also developed a standard data interface for all in-hospital data elements. If the quality of participating sites' exported data from Hospital Information System meets the safety and quality criteria, it is also acceptable of these sites to export and import in-hospital data automatically instead of manual submitting.