A worker shovels magnesium sulfate onto a conveyer belt at the salt fields of Yanhu Lake in Yuncheng, Feb 16. Yanhu Lake, an inland saltwater lake covering an area of 132 square kilometers, is called China's Dead Sea due to its high salinity. It's estimated that the lake will yield some 1.2 million tons of mirabilite (glauber's salt) and 70,000 tons of magnesium sulfate in 2017. [Photo/Xinhua]

A heavy truck drives across the salt field of Yanhu Lake to crush harder crystals of magnesium sulfate, Yuncheng, Feb 16. [Photo/Xinhua]