Photo taken on Dec. 12, 2012 shows a view of the Qinghai Lake at sunrise in northwest China's Qinghai Province. The acreage of the Qinghai Lake has kept expansion for four years in a row, making its current area reach 4,377.75 square kilometers, the largest since 2005, according to the Qinghai Institute of Meteorological Science. The Qinghai Lake is China's largest inland saltwater lake. (Xinhua/Zhang Hongxiang)

 Photo taken on Dec. 12, 2012 shows a view of the Qinghai Lake at sunrise in northwest China's Qinghai Province. The acreage of the Qinghai Lake has kept expansion for four years in a row, making its current area reach 4,377.75 square kilometers, the largest since 2005, according to the Qinghai Institute of Meteorological Science. The Qinghai Lake is China's largest inland saltwater lake. (Xinhua/Zhang Hongxiang) 

Photo taken on Dec. 12, 2012 shows a view of the Qinghai Lake at sunrise in northwest China's Qinghai Province. The acreage of the Qinghai Lake has kept expansion for four years in a row, making its current area reach 4,377.75 square kilometers, the largest since 2005, according to the Qinghai Institute of Meteorological Science. The Qinghai Lake is China's largest inland saltwater lake. (Xinhua/Zhang Hongxiang)