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.

The president-elect said that he would impose the across-the-board tariffs on Day 1 and that they would stay in place until Canada, Mexico and China halted the flow of drugs and migrants.

BEIJING, Nov 27 (Reuters) - 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.

The tariffs, if implemented, could dramatically raise prices for American consumers on everything from gas to automobiles to agricultural products.

A series of swipes at American companies show how China could take the initiative in a new trade war, using its economic dominance to exact pain.

Chinese state media has cautioned that President-elect Donald Trump’s pledge to impose additional tariffs on Chinese goods risks igniting a devastating tariff war between the world’s two largest economies.

Donald Trump has already begun to ramp up threats of a trade war, with a vow to enact sharp new tariffs across the board on imports from Mexico, Canada, and China to strong-arm them into stopping the flow of drugs and migrants.