Screen image taken at Beijing Aerospace Control Center on Aug. 20, 2021 shows Chinese astronaut Tang Hongbo working inside the space station core module Tianhe. (Xinhua/Tian Dingyu)

Screen image taken at Beijing Aerospace Control Center on Aug. 20, 2021 shows Chinese astronauts conducting extravehicular activities (EVAs) out of the space station core module Tianhe. (Xinhua/Tian Dingyu)

Screen image taken at Beijing Aerospace Control Center on Aug. 20, 2021 shows Chinese astronauts Nie Haisheng and Liu Boming conducting extravehicular activities (EVAs) out of the space station core module Tianhe. (Xinhua/Tian Dingyu)

Screen image taken at Beijing Aerospace Control Center on Aug. 20, 2021 shows Chinese astronaut Liu Boming preparing to slip out of the space station core module Tianhe to conduct extravehicular activities (EVAs). (Xinhua/Tian Dingyu)