Shiyi is a modern romance author about whom very little public information is available. Only one work by this author is currently included in the library, namely Sweet Hedgehog. Judging from the byline, Shiyi appears to be a personal pen name; no reliable records have been found for the author's real name, nationality, dates of birth and death, or English name, so no further details about the author's life can be provided. As for the existing work, Sweet Hedgehog is classified as modern romance, a genre typically set against contemporary urban life, centering on the emotional entanglements between the protagonists and emphasizing the development of relationships and the creation of mood. The combination of "sweet" and "hedgehog" in the title suggests that the work may blend a light, sweet tone with layers of wariness, testing, and drawing closer, creating a certain tension. Given the limited number of works, it is not yet possible to summarize Shiyi's consistent writing style or creative trajectory, and the author's future work and readership impact remain to be seen as more material becomes available.