What does Yunnan's single move to parallel volunteer mean?

Yunnan single recruit parallel volunteer refers to multiple parallel volunteer in the same volunteer serial number.

For example, the first batch of undergraduate volunteers are six parallel colleges and universities. These six colleges and universities volunteer side by side and are all second volunteers. The first, second, third and fourth batch of second volunteers all come from parallel volunteer, and parallel volunteer is also a volunteer for the lack of students and the recruitment of volunteers in higher vocational colleges.