"Long Song in White Clothes" tells the story of young doctor Lin Qingran growing up in a busy urban hospital. Lin Qingran entered Renhe Hospital after graduating from medical school. Faced with high-intensity work, life-and-death decisions, and complex interpersonal relationships, she gradually changed from confusion to determination. The story is set in the emergency department of Renhe Hospital, depicting the professional perseverance and human brilliance of medical workers in a high-pressure environment. Lin Qingran's interactions with her colleague Zhou Ziang, head nurse Chen Xuemei, patients' family members and other characters demonstrate the trust and misunderstanding, teamwork and personal sacrifice between doctors and patients. Each chapter focuses on a medical event, from the emergency scene to the operating room, from the patient's struggle to the doctor's inner conflict, and delicately depicts the responsibilities and emotions of medical workers. Through Lin Qingran's perspective, the novel explores the fragility of life, the mission of doctors, and the meaning of finding hope in difficult situations, and pays tribute to those heroes who dedicated themselves silently under the white coat.