Predominantly handwritten Chinese documents on printed police and judicial forms. The deceased is consistently identified as 俞思德, female, aged 20, native of Anhui. The police investigation explicitly treats the death as 服毒自殺. Statements in the dossier examine her family circumstances and relations with her mother, but the evidence should be used cautiously when assigning a single motive. Particularly significant is the evidence section at the end of the file: a 證物封套 is followed by four pages of dense handwritten text apparently left by or associated with Yu Side, providing unusually rich first-person material for the circumstances surrounding the suicide. The corpse examination records several physical findings but ultimately establishes poisoning, rather than traumatic injury, as the cause of death.