The classification of unmanned delivery vehicles is a dynamically developing system. With the maturity of technology, the improvement of regulations and the deepening of application, new categories and forms will continue to emerge. At present, small and medium-sized vehicles in closed/semi-closed scenarios and medium-sized vehicles at the end of urban open roads are the most active development directions. Multi-scene integration: Vehicle design tends to adapt to multiple scenarios (such as from the park to the open road). Modular design: Freight compartments can be replaced to adapt to different cargo needs (room temperature, refrigeration, express cabinets). Vehicle-road coordination: Use roadside intelligent devices (RSU) to assist vehicle perception and decision-making, and improve efficiency and safety. Regulations are gradually opened up: Countries and regions (especially some cities in China) are actively formulating and opening up the right of way for unmanned delivery vehicles. Cost continues to decline: With technological progress and the expansion of mass production scale, the cost of sensors and complete vehicles is declining. Operation Mode Exploration: New model...