On August 18, 2017, the Office of the United States Trade Representative (USTR) initiated an investigation under Section 301 of the Trade Act of 1974 into the government of China’s acts, policies, and practices related to technology transfer, intellectual property, and innovation. On March 22, 2018, the USTR issued a notice of determination and request for comments that stated that the government of China’s acts, policies, and practices covered by the investigation were found to be actionable under Section 301(b) of the Trade Act. The notice proposed the imposition of additional import duties on a preliminary list of 1,300 Chinese products, and indicated that a final list would be forthcoming after the period for public comment expired. See Federal Register, 83 FR 14906. On June 15, 2018, the USTR issued a notice of action providing for the imposition of additional import duties on a final list of Chinese products.
Additional information can be found here: https://www.cbp.gov/trade/programs-administration/entry-summary/section-301-trade-remedies-be-assessed-certain-products-china-effective-july-6-2018