The CASC CH-4 is a Chinese fixed-wing MALE drone built for long-endurance military and state-operated missions rather than consumer or commercial flying. It matters because its confirmed headline figures—38 hours of endurance, 3,500 km range, and an 8,000 m ceiling—place it firmly in the persistent-surveillance class. For most readers, this page is best used as a reference and comparison guide to understand where the CH-4 sits in the broader MALE UAV market.