Lin Yan, the core protagonist of "The Folding Manual of Time and Space", is an ancient book restorer who appears to follow the rules but actually hides secrets. At the age of thirty, he has been stationed in the deepest special collections department of the Municipal Library all year round. His fingertips have rubbed the textures of countless yellowed classics, and he has developed a keen perception of "traces" - whether it is the oxidation level of ink stains or the subtle patterns of paper fiber breakage, nothing escapes his eyes. This professional habit paved the way for him to decode the mystery of space-time folding in the future.
