There are several problems in Hsün Tzu’s view “The sage produces Li-Yi.” Such as: Where does the ability come from? Does it come from inborn special ability (as Professor Mou Tsung-san has suggested)? Hereby, is the difference between sage and common people “Hsing-I” or “Wei-I”? Why could not people produce it? For Hsün Tzu, the sage produces Li-Yi in terms of Chi-shi-lü and Hsi-wei-ku. In this paper, I inquiry onto the above problems by analyzing what he means by Chi-shi-lü and Hsi-wei-ku and deeply getting into his distinction between that which derives from Hsing and that which derives from Wei. And the conclusions are: (i) There is no such a conflict beween Hsing-I and Wei-I in the difference between sage and common people in Hsün Tzu. (ii) The ability in terms of which the sage can produce Li-Yi comes from Wei, but it does not mean that it has nothing to do with Hsing:it is the ability originally coming from Hsing but cultivated by Wei; without the caltivation of Wei, it cannot make the sage produce Li-Yi. (iii) Principly speaking, everyone has the ability to produce Li-Yi, but it refers to one’s will to make the practice of Wei and how deep the practice of Wei he reaches. So, as Hsün Tzu claims, only the sage can produce Li-Yi, but (iv) it is not as the scholars maintain, from the sage’s inborn special ability.