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A rancher herds his cattle in Hitchcock, south of Houston, the United States, on July 15, 2017. The United States has reached agreements with China on final details of a protocol to allow it to export beef to China, the U.S. Department of Agriculture said on June 12. In 2003, China shut its market to American beef after a case of bovine spongiform encephalopathy, also known as Mad Cow Disease, was detected in the United States. (Xinhua/Robert Stanton)