Fig. 5: Representative examples of Song Dynasty Longquan Porcelain Vases.

a Vase in the shape of a Neolithic jade cong, China. Source: Unknown author, Wikimedia Commons, dedicated to the public domain (CC0). b Bottle with lid, Longquan ware, Northern Song Dynasty (960–1127), Dallas Museum of Art. Source: Daderot, Wikimedia Commons, dedicated to the public domain (CC0).