President Donald Trump’s executive order imposing an across-the-board 10% tariff on all US imports from China went into effect. A month later, he doubled it to 20%.

China said on Wednesday that the U.S. has undermined bilateral counter-narcotics cooperation by imposing tariffs on Chinese goods over fentanyl, calling on Washington to stop using the issue as a bargaining chip to "blackmail" the country.

Trump cited the fentanyl issue as the reason for imposing a 10% tariff on all Chinese imports in early February, on top of any existing duties. He doubled that to 20% earlier this month. He also has cited fentanyl, along with other reasons, for imposing tariffs on Canada and Mexico.

China said it has forcefully cracked down on the fentanyl trade and condemned President Donald Trump’s tariffs, as the world’s two largest economies remain at odds over the conditions for any talks to cool tensions.

Canadian and Chinese officials say they were already helping reduce fentanyl smuggling. Prime Minister Justin Trudeau said fentanyl crossing the northern border is "near zero."

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President Trump has doubled tariffs on China to 20% and confirmed 25% duties on imports from Mexico and Canada, citing fentanyl trafficking and trade imbalances.

China has taken multiple steps to control the illegal fentanyl trade, responding to concerns raised by the U.S. government. Fentanyl, a powerful synthetic opioid, has been linked to a rising number of overdose deaths in the U.