Jin Yu is an author about whom very limited public information is available. The library currently holds only one work by this author, Rooftop Plantation, commonly classified under agriculture, forestry, and animal husbandry. Nothing can be verified about Jin Yu's nationality, dates of birth and death, educational background, or writing career, so speculation should be avoided. Judging from the existing work, Jin Yu's writing centers on the specific space of the urban rooftop and focuses on practical methods of cultivation in limited areas, making it a form of practical gardening and agriculture writing close to everyday life. Such topics are usually aimed at general readers and emphasize applicability and the sharing of experience rather than theoretical exposition. With only one work available, it is difficult to judge the full range of the author's style or long-term influence, but the choice of subject shows an interest in urban agriculture and home growing, and offers readers a reference for understanding rooftop cultivation. A fuller account of the author's creative trajectory would require more information.