Parallel volunteer can be regarded as the first choice, which is characterized by: the score follows the choice first, and then the file is searched in turn. The rule of filing is that when it's your turn to file by score, the computer will input your information into a school. If the score does not meet the requirements of A school, the system will continue to search for B, C, D ... until it meets the requirements. Because of the implementation of parallel volunteer, the more prestigious schools, the higher the admission score.

As for the formation of college investment line, take Nanjing University as an example. If you enroll 13 people in your province, the proportion of investment is 1: 1. 05, 15, then, when the score line of Nanjing University 15 is filled in, it will be the filing line. If all 15 students meet the requirements (e.g. subject to professional adjustment) and are admitted, the admission line is the admission line. If 1 students do not meet the requirements, they choose not to obey the professional adjustment and are rejected.