Queqi is an author about whom little public information is available; neither nationality, dates of birth and death, nor an English name has been clearly recorded. Within the library's holdings, Queqi is represented by a single work, Echoes of the Dark River, which is classified as suspense and mystery and serves as the main entry point for understanding this author's creative profile. Based on the currently visible information, Queqi's writing centers on the suspense and mystery genre. The title's "dark river" and "echoes" suggest that the work may use hidden clues and layered resonances to build tension and lead readers to uncover the truth step by step. Because more biographical and creative material is lacking, it is difficult to judge the full range of the author's style or writing trajectory, and it cannot be confirmed whether Queqi has other pen names or has tried other genres. Readers wishing to know Queqi may begin with Echoes of the Dark River, experiencing its narrative rhythm and suspense construction, and watch for future works or related publication information to deepen their understanding of this author.