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.

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.

The president-elect’s threat to hit Canada, Mexico and China with new tariffs is already rocking business and diplomatic relationships and could topple the trade pacts he signed in his first term.

Neither the United States nor China would win a trade war, the Chinese Embassy in Washington said on Monday, after U.S. President-elect Donald Trump threatened to slap an additional 10% tariff on all Chinese imports when he takes office on Jan.

In what will be widely seen as a warning to Trump of the implications of any tariffs imposed on the UK, Downing Street said: “A million Americans work for UK-owned businesses and vice versa, and the fact that UK-US trade was worth £304bn in the last year, clearly that is something that we want to build on.”

Beijing's commerce ministry said tariffs wouldn't 'solve America's own problems.' Investors are taking a wait-and-see approach.

By Joe Cash BEIJING (Reuters) -China attacked U.S. President-elect Donald Trump's pledge to slap additional tariffs on Chinese goods over fentanyl flows, saying his incoming administration was pushing the blame for America's opioid crisis onto China.