担忧经济疲软，缓解国内压力，加拿大减免部分中美钢铝关税

Group 1 - Canada has reduced tariffs on certain steel and aluminum products imported from China and the U.S. to alleviate domestic pressure [1] - The Canadian government has provided exemptions to several companies to avoid the costs of retaliatory tariffs on products that are in short supply or needed under existing contracts [1] - The new exemption measures aim to protect workers and families from the impact of retaliatory measures, particularly in downstream industries [1] Group 2 - China's response to Canada's tariff reductions includes anti-dumping investigations and increased tariffs on Canadian canola seeds, canola oil, seafood, and pork, putting pressure on Canada's agricultural sector [2] - Canadian Prime Minister Carney has sent officials to China for exploratory talks, indicating an effort to repair relations, although challenges remain in persuading China to lift measures against Canadian canola [2] - There is a growing pessimism regarding economic growth in Canada, with over half of Canadians believing the economy will weaken in the next six months, and reports of significant layoffs due to tariffs [2]