At 1:56 a.m. on May 10, the Tianzhou-4 cargo spacecraft, supported by the Long March 7 carrier rocket, flew into space from the Wenchang Cosmodrome on the shore of the sea.

What supplies did the Tianzhou-4 cargo spacecraft bring to the space station? Compared with the previous three "brothers", what is special about Tianzhou IV? Will Tianzhou No. 3 and No. 4 "fight" in the sky at the same time?
With these questions in mind, Xinhua News Agency reporter interviewed Bai Mingsheng, chief designer of the cargo spacecraft system of the Fifth Academy of Aerospace, and asked him to bring full of knowledge points about Tianzhou IV.
Reporters: Zhou Xuan, Guo Liangchuan, Fang Kuan, Li Duojiang (video)
Produced by the Audio and Video Department of Xinhua News Agency