China's research sub dives deep.

The country's first manned science sub goes for global bragging rights – When a team of Chinese engineers set out to build the deepest-diving submersible in the world, they had never laid eyes on a manned deepsea vehicle. "We had only read some reference papers that had pictures; there was no chance for us to see a real manned submersible," says Cui Weicheng, deputy director of the China Ship Scientific Research Center and project manager for the new sub. "We were starting from the very beginning." [ABSTRACT FROM PUBLISHER]