China's Ministry of Commerce said last Thursday that it will impose provisional anti-dumping duties on imported solar-grade polysilicon from the United States and the Republic of Korea. Starting July 24, Chinese importers of solar-grade polysilicon from the United States will be required to pay deposit rates with Chinese customs ranging from 53.3 percent to 57 percent, depending on the dumping margin, the MOC said in a statement posted on its website. Importers from the ROK will have to pay deposit rates ranging from 2.4 percent to 48.7 percent, according to the statement.