![](http://www.ecns.cn/hd/2021/01/18/4df700c0a514476498aba6104d9fe0c2.jpg)
Photo shows the starry sky over the Dongge Cuona Lake that locates at the source of Yellow River in Madoi County, northwest China's Qinghai Province. With a reputation of the "Thousand Lakes County", it has an average elevation of about 4,200 meters, and it is the core area of Sanjiangyuan Nature Reserve. (Photo/China News Service)
![](http://www.ecns.cn/hd/2021/01/18/23d3948ce4774b208154aa587d45bac5.jpg)
Photo shows the unique winter scenery of the Dongge Cuona Lake that locates at the source of Yellow River in Madoi County, northwest China's Qinghai Province. With a reputation of the "Thousand Lakes County", it has an average elevation of about 4,200 meters, and it is the core area of Sanjiangyuan Nature Reserve. (Photo/China News Service)
![](http://www.ecns.cn/hd/2021/01/18/a6b3d20751e2438290e5a23316464054.jpg)
Photo shows the unique winter scenery of the Dongge Cuona Lake that locates at the source of Yellow River in Madoi County, northwest China's Qinghai Province. With a reputation of the "Thousand Lakes County", it has an average elevation of about 4,200 meters, and it is the core area of Sanjiangyuan Nature Reserve. (Photo/China News Service)
![](http://www.ecns.cn/hd/2021/01/18/6c96201bb2fb4211a13e23669da49cee.jpg)
Photo shows the starry sky over the Dongge Cuona Lake that locates at the source of Yellow River in Madoi County, northwest China's Qinghai Province. With a reputation of the "Thousand Lakes County", it has an average elevation of about 4,200 meters, and it is the core area of Sanjiangyuan Nature Reserve. (Photo/China News Service)