Photo taken on June 19, 2013 shows China's manned deep-sea submersible Jiaolong is lifted out of water after a sample-capture mission in the cold vents of south China sea, south China. Qiu Jianwen, a professor from Hong Kong Baptist University, obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday. (Xinhua/Zhang Xudong)

Qiu Jianwen, a professor from Hong Kong Baptist University, waves at the exit of China's manned deep-sea submersible Jiaolong after a sample-capture mission in the cold vents of south China sea, south China, June 19, 2013. Qiu obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday. (Xinhua/Zhang Xudong)

Staff members welcome Qiu Jianwen, a professor from Hong Kong Baptist University, to celebrate his return with China's manned deep-sea submersible Jiaolong after a sample-capture mission in the cold vents of south China sea, south China, June 19, 2013. Qiu obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday. (Xinhua/Zhang Xudong)

Photo taken on June 19, 2013 by China's manned deep-sea submersible Jiaolong shows spider crab captured in the cold vents of south China sea, south China. Jiaolong finished the first diving operation for its first voyage of experimental application in the South China Sea on Monday, a large amount of images were captured during its maiden voyage. Qiu Jianwen, a professor from Hong Kong Baptist University, obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday.(Xinhua/Zhang Xudong)

A researcher takes samples from spider crab captured in the cold vents of south China sea, south China by China's manned deep-sea submersible Jiaolong, June 19, 2013. Jiaolong finished the first diving operation for its first voyage of experimental application in the South China Sea on Monday, a large amount of images were captured during its maiden voyage. Qiu Jianwen, a professor from Hong Kong Baptist University, obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday.(Xinhua/Zhang Xudong)

Photo taken on June 19, 2013 by China's manned deep-sea submersible Jiaolong shows spider crab captured in the cold vents of south China sea, south China. Jiaolong finished the first diving operation for its first voyage of experimental application in the South China Sea on Monday, a large amount of images were captured during its maiden voyage. Qiu Jianwen, a professor from Hong Kong Baptist University, obtained deep-sea samples in the cold vents of the South China Sea during a dive conducted on Wednesday.(Xinhua/Zhang Xudong)