Can be approved by the management department. It is normal for fighter planes to fly at low altitude and ultra-low altitude in order to hide. High-altitude flight is easy to be detected by radar, and now fighters need low-altitude and ultra-low-altitude flight training. According to the provisions of relevant laws, the flight area of military aircraft shall be designated by the military region and the people's governments of provinces, autonomous regions and municipalities directly under the Central Government, or by the military region and the people's governments of provinces, autonomous regions and municipalities directly under the Central Government and the relevant departments of the State Council. The scope of air military restricted zones and particularly important land and water military restricted zones shall be delineated by the State Council and the Central Military Commission (CMC). Before the implementation of this Law, the military restricted zones and military administrative zones designated by the army and local people's governments are consistent with the relevant provisions of the State Council and the Central Military Commission (CMC), and will not be re-designated. Planning and organizing the construction of military facilities should take into account the needs of local economic construction and social development, meet the overall requirements of urban and rural planning, and conduct safety and environmental impact assessment. Where urban and rural planning is involved, the opinions of the local people's government shall be sought, and hot areas of local economic construction and areas with dense civilian facilities shall be avoided as far as possible.