Core Viewpoint - The phenomenon referred to as "Hai Hao" is actually a type of evaporation fog, not a new atmospheric phenomenon, resulting from a significant temperature difference between cold air and warmer water surfaces [4][9]. Group 1: Definition and Origin - "Hai Hao" is a term that originated from local dialects in Dalian, first reported in November 2015, and is not officially documented [4][7]. - The term describes a natural occurrence where cold air flows over warmer water, leading to the formation of fog [9]. Group 2: Weather Conditions and Occurrences - The phenomenon has been observed in various locations, including Changbai Mountain, Qingdao, and Dalian, particularly during cold weather conditions [4][5]. - Specific weather conditions necessary for the formation of this fog include a temperature difference of over 20°C between the air and water [8][9]. Group 3: Expert Insights - Experts from the Ocean University of China emphasize that "Hai Hao" is not a new atmospheric phenomenon but rather a well-known occurrence of evaporation fog under specific climatic conditions [6][9]. - The phenomenon is likened to the steam rising when boiling water, illustrating the visual similarity of the fog formation [9].