China kept this 800-year-old shipwreck a secret for decades - I
Published 15 Jun 2022, 10:54 BST
The steel cage is lowered around the wreck.
Photograph by Maritime Silk Road Museum Guangdong
Concrete blocks on top push the box down into the seafloor.
Photograph by Maritime Silk Road Museum Guangdong
The wreck site and surrounding sediment is secured.
Photograph by Maritime Silk Road Museum Guangdong
The box is raised by a semisubmersible boat.
Photograph by Maritime Silk Road Museum Guangdong
