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.

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.

China is willing to do more to address U.S. concerns about illicit fentanyl trade, an official from the Ministry of Foreign Affairs told reporters Wednesday.