Echoes in the Archive is a novel blending mystery, history, and emotion. It begins with a Republican-era group photo in the municipal archives, linking the secret history of an opera troupe in 1948 to a 2023 cultural relics corruption case on Binjiang Road. Archivist Zhou Mingyuan discovers a strange connection between a woman in the photograph and "Lin Manqi," drawing him into a mystery of identity, a struggle over cultural relics, and a conspiracy spanning generations. The persistence of an impostor, the passion of those who sacrificed themselves, and the struggles of those in power intertwine through clues such as a golden mask. Using the archive as a link across time, the novel uncovers the secrets of four generations who protected historical memory and explores the profound idea that "cultural relics are vessels of memory," telling a story of justice and legacy amid a suspenseful investigation.