China is challenging the latest round of US tariffs against Chinese goods through the World Trade Organization.
The Chinese government on Monday formally requested "dispute consultations" with the United States over the Trump administration's imposition of $16 billion in tariffs on Chinese goods last week. China has responded with similar taxes on US goods.
Its request to the World Trade Organization opens a 60-day period for the two countries to hold talks.
China already is holding talks with the US about its previous tariffs on both Chinese steel and aluminum products and over alleged Chinese violations of US intellectual property protections.
All told, the administration is preparing tariffs on $200 billion in Chinese products. China has vowed to retaliate on American goods worth $60 billion.
Separately, the US ambassador to the WTO, Dennis Shea, told a WTO body that the United States would not support the reappointment of Shree Baboo Chekitan Servansing as a member of the WTO's appellate body, according to a transcript of his remarks in the closed-door session.
If that holds up, the appellate body will fall to three members when Servansing's term expires on Sept. 30. Three is the minimum number of members for the appellate body to rule on cases.
Critics say the United States is trying to asphyxiate the appellate body. The next expiration of a member's term looms in December next year, and the appellate body would become inoperable if new appointments or reappointments aren't made before then.
Shea says the US has long believed the appellate body has operated beyond the terms of its original mandate, and blasted "persistent overreaching" with its decisions on issues like subsidies and antidumping duties, and by "restricting the ability of the United States to regulate in the public interest or protect US workers and businesses against unfair trading practices."
He said US concerns about the appellate body have not been addressed.