Tourists visit the Mount Fanjing in Tongren City, southwest China's Guizhou Province on April 15, 2025. Mount Fanjing is a World Heritage Site that covers an area of 775 square kilometers. It not only provides an important glimpse into geological evolution in southern China but also serves as an ecological security barrier in the middle and upper reaches of the Yangtze River. (Xinhua/Yang Wenbin)