GB/T 38924.8-2020 applies to civil light and small unmanned aircraft systems (including aircraft and ground stations) with a takeoff weight ranging from 0.25 kg to 150 kg, specifying test methods under salt spray environmental conditions. The standard classifies the equipment under test into two categories, A and B, and clearly defines requirements for test conditions, procedures, and result evaluation. A salt spray test chamber is used to simulate the salt spray environment, with parameters such as a 5% sodium chloride solution, a test temperature of 35°C, and a specific salt spray settlement rate. Category A equipment undergoes continuous spraying, while Category B equipment is subjected to an intermittent spraying mode. The test verifies the tolerance of the unmanned aircraft system in a salt spray environment, providing a basis for relevant quality inspections.