30%~50%。 The proportion of the scores of the initial and re-examination in Beijing Jiaotong University varies with different majors. Generally speaking, the initial test scores account for 50%~70% of the total scores, and the retest scores account for 30%~50% of the total scores. The specific proportion is subject to the admissions brochure. The initial examination mainly examines students' basic knowledge and comprehensive quality, and the second examination mainly examines students' professional ability and comprehensive quality.