On the commendation column of the Medical University, Lin Xia's scientific research photos are always dignified and smiling. No one noticed that half of the syringe was exposed in the pocket of her white coat. It was the same type of syringe she used when she made specimens of stray cats when she was seven years old. When her sister's autopsy report showed cardiac arrest, she was mixing perfume in the laboratory - the top note was lily of the valley from her sister's shampoo, and the base note was formalin from her father's autopsy room.