China's government on Sunday denounced the Trump administration's imposition of a long-threatened 10% tariff on Chinese imports while leaving the door open for talks with the U.S. that could avoid a deepening conflict.

President Donald Trump signed an order to put tariffs on U.S. neighbors Canada and Mexico, as well as China, starting Tuesday. Canada and Mexico quickly announced retaliatory tariffs, while China said it would take “necessary countermeasures.

China’s Ministry of Commerce said it would file a legal case at the World Trade Organization, but signaled it still wanted a stable relationship with the U.S.