Neolithic Jade PlaqueThis small plaque (2½ inches by 3¼ inches), dating from about 2000 B.C.E., is similar to others of the Liangzhu area near modern Shanghai. It is incised to depict a human figure that merges into a monster mask. The lower part could be interpreted as his arms and legs but at the same time resembles a monster mask with bulging eyes, prominent nostrils, and a large mouth. (Zhejiang Provincial Institute of Cultural Relics and Archeology/Uniphoto Press, Japan/Ancient Art & Architecture Collection, Ltd.)