Xu Heng was born in 1209, died in 1281, character Zhong Ping, Hanoian (now Henan Xinyang), the world calls him Mr. Lu Zhai. the world said that Mr. Lu Zhai, called "north Xu Nawu" with Wu Chengbing. "Song Yuan Studies Document Lu Zhai To study Document" said that he "studying of the table regulation Zhu", "is popular study in the north". Xu Heng devotes in disseminates Cheng the Zhu Neo-Confucianism, and can under the historical pulsation, govern publicizes the Confucianist classics zealously. In "Lu Room Posthumous writings", related has with the Confucianist tradition classics, and so on chapters. The so-called literal interpretation, namely the direct explanation, refers to with the spoken language annotation classical document. Xu Heng very little uses traditional the explanations of words in ancient books terminology saying that for, says, to say and so on, instead the massive use copula "is", with spoken language annotation Chinese literary style way, not only favors at the beginning of Jin Moyuan Neo-Confucianism north to pass on, also provides the material for the research Chinese spoken language's development.