Fishermen catch fish at a mariculture zone in the sea area of Nanji island in Wenzhou, east China's Zhejiang Province, Aug. 18, 2018. Local fishermen were busy with catching of mussel and large yellow croaker in August. Nanji Township developed mariculture and island tourism industries in recent years. It also built a market network and expanded the market of characteristic marine products. (Xinhua/Xu Yu)