(250421) -- TONGREN, April 21, 2025 (Xinhua) -- An aerial drone photo taken on March 7, 2025 shows the scenery of Mount Fanjing in Tongren City, southwest China's Guizhou Province. 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. (Photo by Li He/Xinhua)