1. The hospital's annual recruitment plan for nurses is fixed, but after the training, the number of nurses who need to fight for is limited, and the number of nurses exceeds the hospital's recruitment plan, making it difficult for some nurses to stay.

2. When recruiting nurses, hospitals tend to recruit nurses with specific specialties or special skills to meet the needs of different departments of the hospital. For some nurses with general specialties or skills, it is more difficult to stay in hospital.