The Thirteen Classics (traditional Chinese: 十三經; simplified Chinese: 十三经; pinyin: Shísān Jīng) is a term for the group of thirteen classics of Confucian tradition that became the basis for the Imperial Examinations during the Song dynasty and have shaped much of East Asian culture and thought. It includes all of the Four Books and Five Classics but organizes them differently and includes the Classic of Filial Piety and Erya. Source: Wikipedia (en)