On December 11, 2008, archaeologists from Peking University, Chinese Academy of Social Sciences and Shandong Province investigated the site of a 3000-year-old Shang Dynasty salt workshop. The sites of two of large-scale Shang Dynasty salt workshops and ten ancient salt making tools have been found in an area extending over 4000 square meters. Several brine pits and evaporation tanks, and two large kitchen ranges for the boiling-off of salt have also been excavated.[Wu Zengxiang/Xinhua]