You need a certificate to enter the drone industry for plant protection. According to the documents of the Civil Aviation Administration, the plant protection machine belongs to five types of aircraft and is suitable for airspace flight: it is suitable for flying over agriculture, forestry, fishery and animal husbandry except areas explicitly prohibited by the state, and the height is limited to less than 30 meters. Plant protection machines must meet the formal standards for plant protection. The flight operation certificate is issued by the plant protection machine manufacturer. If it is only a plant protection drone, there is no need for AOPA.