According to Zhang Wei, the master of Hu Hong, this book is "the essence of words and deeds is the fulcrum of Taoism, and it is also ruled by a turtle" (Attached to the Knowledge). Although Zhu has many objections, he also admits that it is refined and cannot be scrapped because of one or two defects. "Literacy" was written by Hu Hong according to his father Hu Anguo, and there is no theory of good and evil in the subject. Therefore, the theory of life is described in detail. "Sex makes the world exist" is his basic idea. He emphasized the connection between mind and nature, and concluded that "the virtue of mind and nature". Hu Hong thinks that natural principles and human desires are "different with the same use, but different with the same way", while Zhu objected, and wrote "Doubt about Bearded Literacy" as a volume 1, with literacy attached.
Yan Zhi was not handed down to the world, but Chen, a native of Xin 'an, got his old copy in Wuzhong during Hongzhi period of Ming Dynasty. It has been arranged into six volumes, and there is also an engraving in the world. However, the Qing Dynasty's "Summary of Sikuquanshu" thinks that Yan Zhi's words in the handed down edition are wrong, the order is reversed, and there are many distortions. At present, there are five editions, namely, Wu Zhongfang Engraving Edition in Ming Dynasty, Cuilan in Zhuzi in Ming Dynasty, Gezhi Series, Hundreds of Purple Books and Yatang in Qing Dynasty.