Core Viewpoint - The article discusses the exploration and cultural significance of the "Three Rivers Source" in southern Hainan, specifically focusing on the Sanya River, Ningyuan River, and Tiejiao River, highlighting their historical and ecological importance as well as the recent efforts to mark their origins [8][19]. Group 1: Exploration of the Rivers - The Sanya River, despite being the shortest at 32 kilometers, posed significant challenges in locating its source, which is situated in the Linbi Ridge area at an elevation of 913 meters [9][10]. - The exploration involved multiple attempts, with the successful third attempt aided by experts and local guides, culminating in the installation of a stone marker at the river's source on September 25, 2024 [10][14]. - The Ningyuan River and Tiejiao River were easier to trace, with precise geographical coordinates provided by local water conservancy experts [11][13]. Group 2: Cultural and Historical Significance - The rivers have been integral to the development of local civilization, with archaeological findings indicating that the Sanya area has been inhabited for over 10,000 years [21]. - The rivers have shaped the cultural landscape of the region, influencing settlement patterns and economic activities, such as salt production, which dates back over 1,200 years [27]. - The article emphasizes the need for cultural preservation and the potential for tourism development around these historical sites, including the establishment of a national archaeological park and a salt museum [26][27]. Group 3: Urban Development and Economic Impact - The Sanya River basin covers an area of 337 square kilometers, while the Ningyuan and Tiejiao Rivers cover 1,020 and 709 square kilometers respectively, significantly influencing urban planning and development in Sanya [22]. - The urban layout of Sanya is structured around these rivers, with key developments including luxury hotels and medical institutions along the riverbanks, contributing to the city's economic growth [22][23]. - The article suggests that the rivers serve as a cultural and economic engine for Sanya, attracting investment and fostering a unique urban identity [23][24].