The specific approval process is as follows:
1. The use of unmanned aerial vehicles for aerial photography or remote sensing detection flights needs to be approved by the air traffic control department for ground imaging.
2. When applying for a flight plan, the air traffic control department needs to check whether there is a sensitive area and make sure that there is no problem in this area before it can be approved successfully.
Please note that this information may change with the change of time and policies, and it is recommended to review the relevant regulations again before the specific operation.