Shuang Yue is an author about whom limited public information is available; the library currently holds only one work under this name, The Preface to the Sacred Teaching Collected by Huai Ren from Wang Xizhi's Calligraphy. Judging from the title and its usual classification, the book belongs to literary appreciation and centers on the Tang-dynasty stele text assembled by Huai Ren from Wang Xizhi's calligraphy, touching on the origin of the rubbing, the art of calligraphy, and a close reading of the text itself. The author's approach thus appears to be careful reading and appreciation of a classic model book, guiding readers to understand the special form of assembled characters and its significance in calligraphy history. As birth and death dates, nationality, education, and personal experience cannot be confirmed, no speculation is offered here; this note merely outlines the subject matter of the surviving work for readers' reference.
