A tortoise shell found in Wuyang in Henan Province with the characters mu (目), meaning "eye," and jih (日), indicating "sun," could go back perhaps 8000 years in time. It is considered the oldest writing sample yet discovered in China.
河南舞陽發現的一隻有「目」與「日」的龜甲刻文，年代甚至遠達迄八千年，被認為是我國迄今發現的最早文字。