theguardian.com (2026-01-13). China threatens to retaliate over Trump's 25% tariff on countries trading with IranChina has threatened to retaliate against Donald Trump after the US president said he would impose 25% tariffs on countries that trade with Iran… The Chinese embassy in Washington, said Beijing would take all necessary measures to safeguard its legitimate rights and interests after Trump threatened to ramp up the global trade war.