sentences:  Archaeological excavations reveal that as early as the Song dynasty (10th century) potters near Yixing were using local "zisha" (紫砂 or 紫泥 ; literally, "purple sand/clay") to make utensils that may have functioned as teapots.According to the Ming dynasty author Zhou Gaoqi, during the reign of the Zhengde Emperor, a monk from Jinsha Temple (Golden Sand Temple) in Yixing handcrafted a fine quality teapot from local clay.Such teapots soon became popular with the scholarly class, and the fame of Yixing teapots began to spread.