Dossier concerning Ni Yaqin (倪雅琴), an 18-year-old woman from Ningbo (寧波), whose death in Shanghai on 13 August 1945 was investigated as suicide by poisoning. The police non-natural death report identifies her as female, aged 18, and records the incident at No. 14, Lane 396, Jinling Road (金陵路396弄14號). She was subsequently taken for emergency medical treatment, but efforts to save her were unsuccessful.

The police narrative and witness material provide unusually substantial information about the circumstances preceding the suicide. The investigation states that Ni came from a poor family (家境貧寒) and that, several years earlier, her mother had wanted her to become a 童養媳 (tongyangxi, child bride/daughter-in-law raised for future marriage). Ni was dissatisfied with this arrangement, and her grandmother Xu Luoshi (徐羅氏) brought her from Ningbo to Shanghai, where she subsequently lived with her for an extended period. The police reconstruction also refers to the difficult circumstances of her parents and to her mother earning a living through domestic service (代人為傭). These family circumstances were presented by contemporary investigators as part of Ni's unhappiness and sense of dissatisfaction with her situation.

The subsequent interrogation of Xu Luoshi further explores Ni's family poverty, the proposed tongyangxi arrangement, her residence with her grandmother, and the events immediately preceding the poisoning. The testimony describes Ni ingesting a poisonous substance at the residence and being sent for emergency medical assistance. Medical documentation survives in the dossier, followed by formal prosecutorial and medico-legal examination. The judicial documentation identifies the deceased as 倪雅琴, female, aged 18, and supports poisoning as the physiological mechanism of death.