Workers sail out to harvest oysters at an aquafarm in Rongcheng, East China's Shandong Province, on October 13, 2022. Rongcheng has about 560,000 mu (37,333 hectares) of aquaculture facilities with nearly 40 varieties of food, such as sea cucumber, abalone and oyster. Aquaculture has become a pillar industry in Rongcheng. Photo: cnsphoto
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