Photo taken on November 16, 2016 shows the twilight beauty of Lalu Wetlands Nature Reserve in Lhasa, Capital of southwest China’s Tibet Autonomous Region. [Photo/Xinhua]

Photo shows the Lalu Wetlands Nature Reserve at dawn in Lhasa, capital of southwest China’s Tibet Autonomous Region. [Photo/Xinhua]

Photo shows the Lalu Wetlands Nature Reserve at dawn in Lhasa, capital of southwest China’s Tibet Autonomous Region. [Photo/Xinhua]

Photo shows the Lalu Wetlands Nature Reserve at dawn in Lhasa, capital of southwest China’s Tibet Autonomous Region. [Photo/Xinhua]

The Potala Palace is seen from the Lalu Wetland National Nature Reserve at dawn in Lhasa, capital of Southwest China's Tibet autonomous region. [Photo/Xinhua]

Lalu Wetlands National Nature Reserve, also known as “the Lung of Lhasa”, covers an area of 12.64 square kilometers of wetlands in Lhasa, the capital of the Tibet Autonomous Region in the southwestern China. It is the largest and highest urban wetlands nature reserve national wide. The overall ecological environment of the wetlands have been effectively improved since the establishment of nature reserve in 1999. Xinhua reported.