Zhang Anquan is an author about whom little public information is currently available; basic details such as his life story, place of origin, and dates of birth and death remain unclear. Only one of his works is held in the collection, Yanzi Jian (The Swallow Letterhead). Judging from its common classification, the work falls under classical literature, suggesting that his writing carries traditional literary qualities and tends toward classical drama or classical Chinese narrative. The title Yanzi Jian itself hints that the work may revolve around letterhead paper, correspondence, and romance, embodying the subtle, understated beauty often found in classical literature. Because information about the author is so scarce, scholars and readers can mostly understand him and his writing only through this single work, making it difficult to form a complete picture of Zhang Anquan's overall creative output. Further understanding of this author still depends on the text of Yanzi Jian itself and on additional documentary clues that may come to light in the future.
