Why is SIIC hiring people in the same position while cutting people in the same position?

From the perspective of human resources, there are several possibilities:

1, the existing personnel are not competent for their jobs, and it is necessary to recruit new people with stronger ability and replace those with poor ability after certain precipitation;

2. Improve the working atmosphere (fresh blood) of existing posts by recruiting a large number of new people.

3, commonly used measures, temporary workers' wages are lower than regular employees! (Some positions with low technical content)