Tianzhou 4 (Chinese: 天舟四号)
This was the fourth mission of the Tianzhou-class unmanned cargo spacecraft, and the third resupply mission to Tiangong Space Station. The craft was carrying 5 tons of cargos and 1 ton of propellant. It is the largest load capacity cargo spacecraft that is on active duty. It launched on 9 May 2022, docking successfully with the Tiangong space station at the aft port 6 hours after launch. Like previous Tianzhou missions, the spacecraft launched from the Wenchang Satellite Launch Center in Hainan, China on a Long March 7 rocket.
It is a part of the construction of the Tiangong space station and is the third cargo resupply mission to the already launched Tianhe core module (CCM).
Approximately 4” Diameter