1. Insufficient demand: the demand for routes and services of China Southern Airlines Dalian Base is relatively small or stable, and it may not be necessary for a large number of new people to join, and the existing personnel can already meet the operational requirements.

2. Limited training resources: Airlines need to invest a lot of resources to train and cultivate new employees. The Dalian base of China Southern Airlines does not have enough training resources or budget in the short term, which may limit the recruitment of new employees.