Another factor is whether it affects production, because there are two situations: insufficient staffing and excessive staffing, which are also related to the adequacy of reserve personnel. If it is easy to recruit mature new employees, the rational rate can be higher, and if it is difficult to recruit suitable employees, the turnover rate will be lower. If the staffing is seriously inadequate, once you leave, it will affect production, so you need to adjust, increase the number of employees, reduce the labor intensity, and the reasonable rate will also decrease.