Workers shovel salt in Salt Lake in Yuncheng city, Shanxi province, June 17. The famous inland salt lake in China, which covers 132 square kilometers, has recently entered its harvest season. It's also a vital national production base of raw chemical materials. [Photo/Shanxi Daily]

An aerial photo shows workers shoveling salt in Salt Lake in Yuncheng city, Shanxi province, June 29. The traditional five-step salt production method in the Salt Lake was included in the national intangible cultural heritage list in 2014. [Photo/Shanxi Daily]