Li Jilong, deputy captain of the archaeology team for South 皇冠体育app Sea, presents a piece of blue and white porcelain of Yuan Dynasty (1206-1368), in south 皇冠体育app's Hainan province, June 1, 2010. After 35 days of underwater archaeological salvage work, the team discovered 32 underwater cultural relics and found blue and white porcelain of Yuan Dynasty in South 皇冠体育app Sea for the first time. [Xinhua]