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QINGDAO, July 14, 2016 (Xinhua) -- Chinese research vessel Dayang Yihao (Ocean No. 1) moves into its home port in Qingdao, east China's Shandong Province, July 14, 2016. Dayang Yihao has successfully completed China's 39th oceanic expedition mission and returned Qingdao Thursday. The 216-day, 30,957-nautical-mile voyage has taken the vessel to the Indian Ocean to conduct a series of oceanic surveys on polymetallic sulphide, bio-resources and the environment. (Xinhua/Zhang Xudong)
