霜降时节，何处寻红叶（文化中国行·二十四节气二十四问）

Core Viewpoint - The article discusses the significance of the Frost's Arrival (霜降) as the 18th solar term in the Chinese calendar, marking the transition from autumn to winter, and highlights the natural beauty of autumn leaves during this period [1][4]. Summary by Sections Section 1: Frost's Arrival - Frost's Arrival is the 18th solar term and the sixth in autumn, beginning on October 23, 2025 [1]. - It symbolizes the end of autumn and the onset of winter, with frost promoting the maturation of certain crops [1]. Section 2: Leaf Color Change - The color change in leaves is attributed to various pigments such as chlorophyll, carotenoids, and anthocyanins, with chlorophyll dominating in spring and summer [2]. - As temperatures drop in autumn, chlorophyll breaks down, revealing other pigments and leading to vibrant colors in leaves, particularly during Frost's Arrival [2]. Section 3: Autumn Leaf Viewing - The article outlines the best times and locations for viewing autumn leaves across China, with northern regions experiencing peak viewing from late September to late October [3]. - Notable locations include Beijing's Fragrant Hills, known for its yellow leaves, and Benxi in Liaoning, famous for its diverse maple trees [3]. Section 4: Cultural Significance - The changing leaves during this season represent a natural cycle and provide both visual enjoyment and a spiritual experience for observers [4].