The theory sprouted in the period of Yin and Shang dynastyies, formed in the period of Chunqiu and Zhanguo , developed in the period of Dong Han and Xi Han dynasties. 中國古代的環境倫理思想萌芽於殷商時期，形成於春秋戰國時期，兩漢時期得到進一步發展。
In the history of the development of the Yi-ology from the Han to Song dynasties, especially in the studies of the He Tu and Lu Shu, GUAN Lang is a comparatively important scholar. 摘要在從兩漢到唐宋時期的易學發展中，尤其是在河圖洛書方面，關朗是一個比較重要的學者。
