China blames US for fentanyl, opposes tariffs.

• China denounces Trump’s tariff, threatening a 10% tariff on Chinese imports.

• China plans to challenge the tariff at the World Trade Organization and take unspecified countermeasures.

• China’s Commerce Ministry deems Trump’s move “seriously violates” international trade rules.

• China has also taken a lawsuit against tariffs on Chinese-made electric vehicles by the EU.

• China’s most significant pushback is over fentanyl, a drug whose shipments are China-made precursor chemicals.

• China’s Foreign Ministry argues that fentanyl is America’s problem, citing extensive anti-narcotics cooperation with the US.