Generally speaking, if it is compiled by the Education Bureau, then you are a member of the Education Bureau. If the school made it up, you are from the school. It seems that you should work in an established place. The Education Bureau and the school are two units, and the number of staff in one unit is limited. I don't know why the establishment of school teachers is hung in the Education Bureau. If it is the other way around, it is easy to explain. Because the establishment of the Education Bureau is full, they want to use this person, and the establishment of people working in the Education Bureau is hung in the school, and you are the other way around, so it may be for the convenience of management in the future. I don't know if you are talking about special post teachers, because it seems that the three-year contract of special post teachers will be unified.
But then again, there is no difference between the establishment of the Education Bureau and the school, because the establishment of these two units is under the control of the Education Bureau.