From the Document: "In early 2019, the World Trade Organization (WTO) ruled in favor of the United States in two cases that the U.S. Office of the Trade Representative (USTR) filed against China, alleging that China's agricultural policies were inconsistent with its WTO obligations. While China agreed to conform to the WTO rulings, USTR contends that Beijing failed to act on one of the cases by the agreed-upon deadline of June 30, 2020. On July 16, 2020, USTR submitted a notification to the WTO requesting authorization to take countermeasures against imports from China."
CRS Insight, IN11469
Congressional Research Service: https://crsreports.congress.gov/