Yixing (simplified Chinese: 宜兴; traditional Chinese: 宜興; pinyin: Yíxīng) is a county-level city with a population of 1.24 million administrated under the prefecture-level city of Wuxi in southern Jiangsu province, People's Republic of China, and is part of the Yangtze River Delta. With active modern industry as the economical fundamentals, it is more famous for traditional Yixing clay and the pottery made from that—especially the "zisha"-style teapots.