While the vast majority of Canadian exports were exempt from the tariffs now struck down, the ruling does not effect duties harming several key industries.
The ruling by China’s highest court followed a recent meeting between China and Canada’s top leaders that led to a thaw in the two countries’ relations.
President Trump said he would impose tariffs if Canada made “a deal with China,” though there is no sign that those countries are discussing a broad trade agreement.
U.S. trade policy has devastated the Canadian auto industry and pushed the country to reach an agreement that will make it easier for Chinese companies to sell cars there.
Prime Minister Mark Carney got a standing ovation in Davos for starkly describing the end of Pax Americana. He is looking for new allies to help his country survive it.