China's state media have praised some U.S. firms for "strong collaboration" - commentary that comes amid fears of a trade war and is reminiscent of how tensions with the U.S. were covered by Chinese newspapers during Donald Trump's first presidency.

China's state media warned U.S. President-elect Donald Trump his pledge to slap additional tariffs on Chinese goods over fentanyl flows could drag the world's top two economies into a mutually destructive tariff war.

Economists worry that Trump's tariff plan will raise the prices of a range of imported goods, from cars to electronics.