Twice. Standardized training refers to the standardized training of residents. The national unified examination is conducted twice a year, and the examination is divided into theory and operation. These two kinds of examinations must be conducted in the same province. The score of supervision examination accounted for 60%, and the total score of each assessment part of residents or specialists was 100, and 80% passed. The single elimination system is implemented, that is, those who fail in any part are judged to be unqualified in the whole assessment.