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Oracle bone script (Chinese: 甲骨文) was the form of Chinese characters used on oracle bones—animal bones or turtle plastrons used in pyromantic divination—in the late 2nd millennium BC, and is the earliest known form of Chinese writing. The vast majority, amounting to over 50,000 inscribed items, were found at the Yinxu site (in Xiaotun, near modern Anyang, Henan Province).