China's reasearch vessel Dayang Yihao, or Ocean One, docks at the Olympic Sailing Center in Qingdao, East China's Shandong province, Dec 11, 2011, after a scientific expedition conducted in the Indian, Pacific and Atlantic oceans. The expedition, kicking off on Dec 8, 2010, was the third and largest round-the-world ocean probe in the history of China's deep-sea exploration. (Xinhua/Li Ziheng)

Citizens greet China's reasearch vessel Dayang Yihao, or Ocean One, as it docks at the Olympic Sailing Center in Qingdao, east China's Shandong Province, Dec. 11, 2011. The vessel has just returned from a scientific expedition in the Indian, Pacific and Atlantic oceans. The expedition, kicking off on Dec. 8, 2010, was the third and largest round-the-world ocean probe in the history of China's deep-sea exploration. (Xinhua/Jin Liwang)