"The US is irresponsible in putting Chinese companies on a list of notorious marketplaces," the Ministry of Commerce here said.
China hopes the US will objectively evaluate China's work on Intellectual Property Rights protection, the ministry spokesperson Shen Danyang told reporters here.
Given that the US trade representative's office was ambiguous in its descriptions of Chinese companies, its report did not represent the US government's analysis, Shen was quoted as saying by state-run Xinhua news agency.
China has been negotiating with the US on "notorious marketplaces", Shen added.