A giant screen shows Chinese astronauts Nie Haisheng (C), Liu Boming (R), and Tang Hongbo of the Shenzhou-12 mission saluting inside the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter 

A giant screen shows Chinese astronauts Nie Haisheng (C), Liu Boming (R), and Tang Hongbo of the Shenzhou-12 mission saluting inside the Tianhe core module of China's space station, at a shopping mall in Beijing, China June 18, 2021. REUTERS/Thomas Peter 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming speak before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming are seen before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming salute before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming salute before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Tang Hongbo, Nie Haisheng and Liu Boming wave before the launch of the Long March-2F Y12 rocket, carrying the Shenzhou-12 spacecraft and the three astronauts, from Jiuquan Satellite Launch Center for China's first manned mission to build its space station, near Jiuquan, Gansu province, China June 17, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Liu Boming salutes as he meets members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo wave as they meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins REFILE - CORRECTING ACTION 

Chinese astronauts Nie Haisheng, Liu Boming, and Tang Hongbo wave as they meet members of the media behind a glass wall before the Shenzhou-12 mission to build China's space station, at Jiuquan Satellite Launch Center near Jiuquan, Gansu province, China June 16, 2021. REUTERS/Carlos Garcia Rawlins 

Chinese astronaut Zhai Zhigang (2nd R) salutes China's President Hu Jintao (2nd L) after being awarded with the title of "Space Flight Hero" at the Great Hall of the People in Beijing November 7, 2008. Liu Boming (L) and Jing Haipeng (R) was awarded with the title of "Heroic Astronaut". China held a meeting on Friday morning to award people who made outstanding contributions to the Shenzhou VII manned space flight, Xinhua reported. REUTERS/Jason Lee (CHINA)