Amidst the dramatic shifts that took place across the social order in the middle of the Ming Dynasty, Zhan Ruoshui and Wang Yangming are leading lights that command our attention in the field of Confucian thought. The two cooperated closely in reflecting on and critiquing Zhu Xi’s theories, which had become the dominant ideology. And they led the way as competitors in pursuing new avenues in Confucian thought. The newly discovered manuscript of Zhan’s poem “(Written for [Deng] Junke,) Explaining the Investigation of Things” is a five-character “old-style” poem that he send to his disciple Deng Zhen. The poem generally summarizes Zhan’s views on the “investigation of things” found in the text of the Great Learning, in contrast with Wang Yangming’s newest positions on the subject. Written in response to Deng’s piece, “Explaining the Investigation of Things with [Chen] Shijie,” and against the background of Zhan and Wang positioning themselves in the debates around the “investigation of things,” this poem is certainly one of the key documents in the ongoing exchanges between these two men on one of the most contentious and divisive issues that emerged in Confucian intellectual trends of the day. The survival of this five-character old-style poem, “Explaining the Investigation of Things,” provides us with an indirect perspective on the scholarly interactions between Zhan and Wang in a specific historical context. The precious message inherent in the material form of his calligraphy was lost because only the words were preserved in later publications. This article will bring the message to light by analyzing the calligraphy and its other material aspects.