Aerial photo taken on on July 8, 2019 shows scenery of the Nianbaoyuze scenic resort in the Sanjiangyuan nature reserve in Jiuzhi County, Golog Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)
XINING, June 4 (Xinhua) -- Sanjiangyuan, a major natural reserve in northwestern China, saw rising vegetation coverage in 2019, according to the latest monitoring data.
Sanjiangyuan, meaning the "source of three rivers", is home to the headwaters of the Yangtze, Yellow and Lancang rivers.
The environmental quality remained stable in the area compared with the previous year, with grassland coverage reaching 77 percent, according to the report released by authorities of Qinghai Province.
Photo taken on Nov. 9, 2019 shows the Donggi Conag Lake in Madoi County, Golog Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Zhang Long)
Photo taken on June 21, 2019 shows a section of the Lancang River in Zadoi County, Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Zhang Long)
Aerial photo taken on Aug. 6, 2019 shows a section of the Damqu River, a source of the Yangtze River, in Zadoi County, Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)
Aerial photo taken on July 9, 2019 shows scenery of the Nianbaoyuze scenic resort in the Sanjiangyuan nature reserve in Jiuzhi County, Golog Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)
Aerial photo taken on Aug. 9, 2019 shows a section of the Qumar River, a source of the Yangtze River, in Yushu Tibetan Autonomous Prefecture, northwest China's Qinghai Province. (Xinhua/Wu Gang)
Aerial photo taken on Aug. 9, 2019 shows a section of the Tuotuo River, the source of the Yangtze River, in Golmud, northwest China's Qinghai Province. (Xinhua/Wu Gang)
Liu Min (L) and Zhang Liangyuan, two researchers from the Yangtze River Scientific Research Institute, collect water samples from a source of the Yangtze River in northwest China's Qinghai Province, Aug. 8, 2019. (Xinhua/Wu Gang)
