Efforts are underway to recover thousands of barrels with hazardous chemicals floating down a Chinese river towards Russia. On 28 July, over 7,000 containers from a chemical plant in northern China were washed into the river Sungari, a tributary of the Amur. According to the Chinese side, about 3,000 barrels contain dangerous chemicals, while another 4,000 are empty. 7,138 barrels have been recovered from the river so far. That includes 3,571 barrels containing chemicals. According to estimates, the barrels could float into the waters of Russia's Amur River within two weeks.