At 18:00 on May 5, 2020, the Long March 5B carrier rocket, carrying a new generation of manned spacecraft test ship and a flexible inflatable cargo return cabin test cabin, ignited from the Wenchang Space Launch Site in China.
Previously, the tail section of the Long March 5 rocket used a structural scheme consisting of a composite beam combined with a split FRP bottom plate. In the development of the Long March 5B rocket, ZGHT used the large-diameter and large-thickness carbon fiber composite "3+2" honeycomb sandwich structure integral molding technology to form the wall panel and heat shield structure of the first-stage tail section to achieve The weight loss is about 400 kg.