Beijing, Feb. 28 -- China firmly opposes the United States' threat of a further 10-percent tariff on goods imported from China on the pretext of fentanyl-related issues, the Ministry of Commerce (MOC) said Friday.

If the United States persists, China will take all necessary countermeasures to protect China's legitimate rights and interests, an MOC spokesperson said in a statement.

While saying that China has taken note of the U.S. move, the spokesperson said that China had repeatedly stated that the unilateral imposition of extra tariffs violates WTO rules and undermines the multilateral trading system.

China is one of the countries that has the strictest drug control policies and highest levels of enforcement globally, and China has ...