Kang Ding () or Geng Ding () was a king of the Shang dynasty of China. His given name is Xiao (). He was enthroned in the year of Jiawu () and his capital was at Yin ().Bamboo Annals

Reign Different sources suggest different reign lengths for Geng Ding. The Bamboo Annals suggest an 8-year reign. On the other hand, the Song dynasty Zizhi Tongjian Waiji (A supplement to the Zizhi Tongjian) and Tongzhi Encyclopedia suggest a 6-year reign. The Diwang Benji () quoted in Tongzhi suggests a 11-year reign.

Irrespective of reign dates, several oracle bones featuring inept handwriting have been dated to the reign of Geng Ding and Lin Xin, particularly from the diviner Peng.甲骨文合集 27543甲骨文合集 26899甲骨文合集 31420甲骨文合集 34127 These typically consist of an individual copying an existing diviner's work (e.g. Those from Nan), having it checked, and repeating. This is among the earliest examples of Chinese education and literary training.

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