Tiangong-1

Chinese astronauts Cai Xuzhe and Song Lingdong broke the 23-year-old record for the longest spacewalk, completing a historic 9-hour extravehicular activity aboard the Tiangong space station

The rocket, Long March 5B, was used to send the final part of the Tiangong space station called Mengtian to the space station

Tiangong-1 was placed in orbit in September 2011, an important step in China's efforts towards building its own space station