Yang Liwei, the first Chinese taikonaut sent into space by the Chinese space program and the 241st person to undergo a spacewalk after he stepped out of his re-entry module on October 16, 2003. Apparently, the Chinese Astronaut heard knocking on his space door. According to him, the noise was like a “hammer hitting an iron bucket” and said it would reoccur from time to time.
“It neither came from outside nor inside the spaceship, but sounded like someone is knocking the body of the spaceship just as knocking an iron bucket with a wooden hammer,” the 51-year-old taikonaut , as astronauts are known in China, told China Central Television.
Liwei said he moved closer to the porthole to try to figure out where the sound was coming from, but everything on the interior and exterior of the craft appeared to be as normal.
Taikonaut on China’s Shenzhou 6 and Shenzhou 7 spaceships have also reported hearing similar sounds in space.
Liwei added that he never heard the sound again once he returned to Earth, and he even tried to replicate the noise in the hopes a technician could solve the mystery.
He was given the title “Space Hero” in 2011 by the Chinese Central Military Command.