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].

Group 1 - Shandong is home to five UNESCO World Heritage sites, showcasing its rich cultural and natural heritage [1][2][3] - Mount Tai, a dual heritage site, symbolizes ancient Chinese civilization and is known for its geological and cultural significance, with a peak elevation of 1545 meters [1] - The Confucian Temple, Confucius Mansion, and Confucius Forest in Qufu represent the largest and best-preserved Confucian cultural complex globally, recognized for its moral and educational significance [3][2] Group 2 - The Shandong section of the Grand Canal is a core part of the UNESCO World Heritage designation, exemplifying ancient water conservancy engineering [4][5] - The Grand Canal features 15 heritage sites and 8 river sections, reflecting the historical integration of transportation and commerce [5] - The Qi Great Wall, predating the Qin Dynasty, spans over 1200 miles and showcases ancient architectural wisdom in military defense and ecological protection [6] Group 3 - The Yellow River Delta is recognized as a natural heritage site, hosting the most complete and expansive wetland ecosystem in China, vital for migratory birds [7][8] - This area serves as a crucial stopover for millions of migratory birds, including 26 species of national first-class protected birds, highlighting its ecological importance [8]