Inclusion Criteria:  Students whose age meets the requirements. Students majoring in physical education in Ningxia University. Students who voluntarily participate and pass the qualification assessment. Students who can complete the experimental intervention plan. Students who have not participated in the examination and training.  Exclusion Criteria:  Excluded because age of not meeting inclusion criteria Drop out be absent with leave、refuse to participate; Students who are often absent from school and late. Students who have already taken the exam. Not a college student in Ningxia University.