Cargo is a mission

Tianzhou is China’s cargo-spacecraft program. Its tasks include transporting supplies and experiment equipment, replenishing propellant and taking away waste. Shenzhou carries people and returns them to Earth; Tiangong provides their orbital workplace. These roles complement one another without making the vehicles interchangeable.

Logistics starts with what a station will need, when it will need it and how the crew can use it. A fictional spare may have the right mass but the wrong connector. Delivering it would count as transportation while failing the maintenance objective. Compatibility, labeling and accessible packaging matter alongside launch capacity.

The image shows Tianzhou-2 being prepared on the ground. Its docking end and cargo body help explain its purpose. The photograph cannot show that supplies later reached the station or that a transfer was completed; those claims need flight and inventory records.