Why should state-owned enterprises recruit senior students for internships?

Let the students stay in their posts. State-owned enterprises recruit senior students for internships in order to keep them in their posts. Students with rich work experience can directly become formal employees of enterprises after graduation. State-owned enterprises refer to wholly state-owned enterprises, wholly state-owned companies and state-owned capital holding companies that the State Council and local people's governments perform the responsibilities of investors on behalf of the state respectively.