This aerial photo taken on June 16, 2023 shows a view of the Qumar River at the source region of the Yangtze River, China's longest river, in northwest China's Qinghai Province. The 6,300-kilometer Yangtze River, the longest river in China and the third longest in the world, has three sources, namely the Tuotuo River, the Damqu River in the south and the Qumar River in the north.

Located in the hinterland of the Qinghai-Tibet Plateau between the Kunlun Mountains and the Tanggula Mountains, the Yangtze River source region, with an average elevation of more than 4,500 meters, features spectacular scenery and rich biodiversity. It also has one of the most abundant water resources in the world. (Xinhua/Jin Liwang)

Tibetan wild donkeys forage near the Qumar River at the source region of the Yangtze River, China's longest river, in northwest China's Qinghai Province, June 15, 2023. The 6,300-kilometer Yangtze River, the longest river in China and the third longest in the world, has three sources, namely the Tuotuo River, the Damqu River in the south and the Qumar River in the north.

Located in the hinterland of the Qinghai-Tibet Plateau between the Kunlun Mountains and the Tanggula Mountains, the Yangtze River source region, with an average elevation of more than 4,500 meters, features spectacular scenery and rich biodiversity. It also has one of the most abundant water resources in the world. (Xinhua/Jin Liwang)

This aerial photo taken on July 23, 2021 shows a view of the Damqu River at the source region of the Yangtze River, China's longest river, in northwest China's Qinghai Province. The 6,300-kilometer Yangtze River, the longest river in China and the third longest in the world, has three sources, namely the Tuotuo River, the Damqu River in the south and the Qumar River in the north.

Located in the hinterland of the Qinghai-Tibet Plateau between the Kunlun Mountains and the Tanggula Mountains, the Yangtze River source region, with an average elevation of more than 4,500 meters, features spectacular scenery and rich biodiversity. It also has one of the most abundant water resources in the world. (Xinhua/Zhang Long)

This aerial photo taken on June 15, 2023 shows a view of the Tuotuo River at the source region of the Yangtze River, China's longest river, in northwest China's Qinghai Province. The 6,300-kilometer Yangtze River, the longest river in China and the third longest in the world, has three sources, namely the Tuotuo River, the Damqu River in the south and the Qumar River in the north.

Located in the hinterland of the Qinghai-Tibet Plateau between the Kunlun Mountains and the Tanggula Mountains, the Yangtze River source region, with an average elevation of more than 4,500 meters, features spectacular scenery and rich biodiversity. It also has one of the most abundant water resources in the world. (Xinhua/Jin Liwang)