Video PlayerClose

Ruddy shelducks and black-headed gulls are seen on a lake in Longwangtan Park in Lhasa, capital city of southwest China's Tibet Autonomous Region, March 13, 2019. (Xinhua/Zhang Rufeng)

Ruddy shelducks and black-headed gulls are seen on a lake in Longwangtan Park in Lhasa, capital city of southwest China's Tibet Autonomous Region, March 13, 2019. (Xinhua/Zhang Rufeng)