Composite administrative dossier concerning investigations of deaths, suicides, unidentified corpses, and injuries reported by suburban county governments and police authorities to the Shanghai Special Municipal Government in 1945. The file contains several distinct cases rather than a single incident. One group of documents concerns Zhou Sibao (周四保/周四寶), an airport laborer who committed suicide by drowning at Yuepu (月浦鎮); the authorities investigated his identity, family circumstances, mental condition, and the circumstances of his death. A second group concerns Cai Helin (蔡鶴林), whose death followed the ingestion of poison and whose case includes investigative reports and suicide letters. Other documents concern an unidentified male corpse found on the seashore northwest of Shidong (石洞西北海灘), with repeated instructions to continue inquiries into the deceased's identity and circumstances. The final section concerns an accident in Chuansha involving the collapse of a floor in the residence of a local security official, causing injuries to several people; municipal and county authorities investigated responsibility and ordered follow-up action.