What is the purpose of recruiting personnel agents in vocational and technical colleges?

When there are not enough university teachers, some contract teachers, that is, temporary substitute teachers, will be recruited through personnel agents.

Vocational and technical college is a type of ordinary colleges and universities in China, with full-time college-level higher vocational education as the main content, and the academic system is usually three years. In the order of admission to the general college entrance examination, it is a group of higher vocational colleges with unified recruitment, and it is also a "three-book" admission institution for vocational high schools, secondary specialized schools and technical colleges.