Haiyang-6, a Chinese research vessel, is seen at a dock in Guangzhou, capital of south China's Guangdong Province, May 28, 2013. An expedition team of 96 members aboard Haiyang-6 set out for the Pacific Ocean Tuesday to carry out a five-month survey on undersea mineral resources. (Xinhua/Liang Zhiwei)

Wang Fei (L), director of China Ocean Mineral Resources Research and Development Association, confers a flag to a team member beside Haiyang-6, a Chinese research vessel, at a dock in Guangzhou, capital of south China's Guangdong Province, May 28, 2013. An expedition team of 96 members aboard Haiyang-6 set out for the Pacific Ocean Tuesday to carry out a five-month survey on undersea mineral resources. (Xinhua/Liang Zhiwei)

 A member of an expedition team poses for a photo with his daughter beside Haiyang-6, a Chinese research vessel, at a dock in Guangzhou, capital of south China's Guangdong Province, May 28, 2013. An expedition team of 96 members aboard Haiyang-6 set out for the Pacific Ocean Tuesday to carry out a five-month survey on undersea mineral resources. (Xinhua/Liang Zhiwei)

A girl waves goodbye to the sailing Haiyang-6, a Chinese research vessel, at a dock in Guangzhou, capital of south China's Guangdong Province, May 28, 2013. An expedition team of 96 members aboard Haiyang-6 set out for the Pacific Ocean Tuesday to carry out a five-month survey on undersea mineral resources. (Xinhua/Liang Zhiwei)