Aerial photo taken on May 17 shows salt fields in Gangxi town of Rongcheng, Shandong province. Salt fields here have entered their harvest season now. [Photo provided to chinadaily.com.cn]

The colorful salt fields look like "eyeshadow compact" from above. [Photo provided to chinadaily.com.cn]

The abundant sunshine and rich wind resources engender the natural wind drying method of salt collection in Rongcheng. [Photo provided to chinadaily.com.cn]

An aerial view of the colorful salt fields in Gangxi town of Rongcheng, Shandong province. [Photo provided to chinadaily.com.cn]

Rongcheng is an important sea salt production base in Shandong province. [Photo provided to chinadaily.com.cn]