Workers retrieve chemical containers from the Songhua River at the Wukeshu Dock in Yushu City, northeast China's Jilin Province, July 29, 2010. More than 7,000 chemical containers were washed into the Songhua River by rain-triggered floods in Yongji County on Wednesday. About 3,000 of the barrels contained 170 kilograms of chemicals each and the rest were empty. About 1,100 barrels had been recovered as of Thursday afternoon. [Xinhua]