Recently, Chenggan Township in Nujiang Prefecture, Yunnan Province successfully completed a test flight of drone delivery of mail. The drone completed the delivery in five minutes over a distance of 3 kilometers, while it took two hours for a postman to deliver on a motorcycle. 98% of the area of Nujiang Prefecture is mountainous canyons, with complex terrain and long-term inconvenience in logistics and transportation. Using drones to deliver express can better serve people's life needs.