I recommend a mystery novel. The male protagonist is called Autumn Water, and the plot is centered around an ambulance driver.

I recommend "Above the Mist." Although the male lead is not an ambulance driver, the male lead in the story, Bai Yanliang, is a mentally ill patient. He was previously sent to the hospital for observation and treatment. Later, he was discharged after his emotions were determined to be stable. In the novel, he met the female protagonist, Shen Chuchu, and they worked together to uncover a bizarre murder case, discovering the conspiracy and secrets behind it. I hope you like this fairy's recommendation. Muah ~😗