Pic Title: "Datong calendar through rail," the compilation Related Events: 《大统历法通轨》的编纂 Related pictures: "Datong calendar through rail," the compilation Source: http://image.iask.sina.com.cn/ Pic Description: 　　1384 _ Open Dictionary _ Sina edit this paragraph. GuoShouJing in AD 1384, six decades, Hongwu seventeen years. Hongwu seventeen years (1384) 15 May Translated by Google No. / 2 Picture

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