Core Viewpoint - The article highlights the ecological and historical significance of Xieshan Mountain located in Poyang Lake, Jiangxi Province, emphasizing its role as a habitat for migratory birds and a site of historical military importance [2][4]. Group 1: Ecological Importance - Xieshan Mountain serves as a critical habitat for thousands of migratory birds during autumn and winter, making it an essential site for observing bird migration and studying wetland ecosystems [4][6]. - The eastern cliff of Xieshan is heavily covered with bird droppings due to the dense bird population, creating a unique visual appearance reminiscent of a "snow mountain" [4]. Group 2: Historical Significance - The mountain has been a strategic military location throughout history, notably during the Three Kingdoms period when Zhou Yu trained his navy there, and during the late Yuan dynasty when Zhu Yuanzhang fought Chen Youliang [4]. - The geological formation of Xieshan, created by glacial forces 200,000 years ago, serves as a testament to Earth's geological movements [2].

Core Points - The article highlights the ecological restoration efforts in Fangchenggang, Guangxi, particularly focusing on the increase in the population of egrets and the expansion of mangrove areas [1][3][4] - Fangchenggang has been recognized as "China's Hometown of Egrets" due to its rich biodiversity and significant wetland areas [1][3] Group 1: Ecological Restoration Efforts - Fangchenggang has implemented measures such as mangrove ecosystem restoration, returning ponds to the sea, and enhancing coastal wetland hydrodynamics, resulting in an increase of over 200 hectares of mangrove area since 2020, totaling nearly 2,300 hectares [3][5] - The number of bird species in the Beilun River Estuary Nature Reserve has increased from 187 species in 2010 to 310 species currently, including rare and endangered species [3][4] Group 2: Biodiversity and Habitat - The city serves as a crucial stopover for over 300,000 migratory birds annually, with a significant presence of shorebirds, gulls, and egrets [4][5] - The establishment of three national nature reserves and the designation of important wetland areas have contributed to the protection of wildlife habitats, enhancing public awareness of migratory bird conservation [5]