Core Viewpoint - The article highlights the vibrant autumn scenery in Beijing, particularly focusing on the best viewing spots for colorful leaves and the ongoing chrysanthemum exhibitions in various parks, emphasizing the city's natural beauty and seasonal attractions [2][3][5]. Group 1: Autumn Scenery - Beijing's parks, including Xiangshan Park and the National Botanical Garden, are experiencing peak viewing periods for colorful leaves, with Xiangshan Park reporting over 60% color change in foliage [2][3]. - The National Botanical Garden features a large artificial water cypress forest, showcasing a blend of orange and yellow hues, creating a picturesque ecological scene [3]. - Yuyuantan Park has over 85% color change in leaves, attributed to favorable weather conditions this year, and has designated several unique autumn viewing spots [4]. Group 2: Chrysanthemum Exhibitions - The 44th Chrysanthemum Exhibition at the Temple of Heaven features over 10,000 chrysanthemums, highlighting the theme "Four Elegances of Chrysanthemum" and showcasing a variety of traditional and innovative chrysanthemum designs [5][6]. - Beihai Park is reintroducing the tall "Zhangju" chrysanthemum, which can reach heights of up to 3 meters, drawing significant attention from visitors [6]. Group 3: Environmental Initiatives - Several parks in Beijing are implementing "slow leaf sweeping" practices to enhance the autumn experience for visitors while planning for the resourceful recycling of fallen leaves [7][8]. - The National Botanical Garden has a facility that processes approximately 20,000 cubic meters of green waste annually, converting it into organic substrates for soil improvement, saving around 1 million yuan in fertilizer costs each year [8][9]. Group 4: Weather Impact on Foliage - This year's autumn foliage color change has been delayed by about a week due to unfavorable weather conditions, including high temperatures and excessive rainfall in September and October [10][11]. - The physiological processes affecting leaf color change are influenced by temperature fluctuations and sunlight exposure, which were not optimal this year, leading to slower color transformation in trees like the yellow larch and maple [11].

Core Viewpoint - Beihai Park is showcasing its giant chrysanthemums for the first time in decades during the current chrysanthemum exhibition, attracting significant attention from visitors [1] Group 1: Exhibition Details - The giant chrysanthemums, reaching heights of over 1.7 meters and some even up to 3 meters, are a highlight of the exhibition [1] - This year's chrysanthemum exhibition features approximately 40,000 pots of flowers, with dozens of pots of giant chrysanthemums on display, including both old varieties from the Qing Dynasty and new varieties cultivated by the park [2] - The park has introduced a chrysanthemum sample room to provide citizens with ideas for decorating their homes with chrysanthemums [2] Group 2: Cultivation Techniques - The cultivation of giant chrysanthemums is challenging, requiring careful management of pot sizes and leaf integrity throughout the growth process [2] - The park's fifth-generation inheritor of traditional chrysanthemum cultivation techniques, Liu Ning, emphasizes the importance of maintaining the beauty of the plant by removing side buds and ensuring the leaves remain intact [2] - Beihai Park has nearly 1,000 varieties of chrysanthemums, but not all can be grown as giant chrysanthemums [2] Group 3: Community Engagement - The "Chrysanthemum into the Community" initiative has been running for over ten years, distributing nearly 20,000 chrysanthemum seedlings to residents [2] - The park has set up a master exhibition platform in the Xitian Fanjing scenic area, inviting five chrysanthemum masters from Beijing-Tianjin-Hebei to showcase their works [2]