Analysis of information sources in references of the Wikipedia article "Hu Yuan" in English language version.
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: CS1 maint: location missing publisher (link)"For many of his biographers, Hu Yuan was a forerunner of the Cheng-Zhu school of Daoxue, worthy to be called a "master of the early Northern Song." He is best known for being Cheng Yi's teacher at the Imperial Academy in Kaifeng, showing his brilliant student how to pursue true Confucian learning. Also, he is described as a man of action, who made significant contributions in reforming the school system and the court musical instruments. (...) The image of Hu Yuan as a serious thinker is particularly clear in his commentary on the Yijing, the Zhouyi kouyi