In the height of summer in 2025, the scorching afternoon sun poured through the glass curtain walls of Jingzhou First Hospital, one of Huaguo's top hospitals, casting dappled patterns of light across the smooth marble floors. Yet the surgical floors of the hospital's cardiothoracic department felt none of the heat. The central air conditioning kept the temperature precisely at 22 degrees Celsius, an ideal temperature for surgery: cool enough to keep doctors from being distracted by the heat, while also minimizing the risk of postoperative infection for patients.
