BH2VSQ According to the Ministry of Industry and Information Technology, the reason is that national-level and provincial-level permissions need to be separate. I have also explained why the vehicle moving platform, fixed platform, and other platforms are different. As for the rest, each province understands it differently. However, as I previously explained, a license does not necessarily mean a call sign, so only one is not sufficient. In this case, the Ministry of Industry and Information Technology has issued multiple licenses, and it's normal for provincial-level to follow suit. Alternatively, we could say that issuing one license ≠ having to issue one license 😀