WASHINGTON - Americans doing business with China expressed concerns over the US President-elect Donald Trump's recent remarks on Taiwan, fearing they might lead to a souring China-US relations and be detrimental to trade, media reports said on Monday.

The sources who didn't want to be named stressed the importance of the ties between the United States and China, the biggest developing economy with colossal market potential.

They noted that they were unsettled by any suggestion of abandoning the one-China policy, which they said had served the business community well for several decades.

According to them, China is not only a critical source of revenue and profits for the United States, but also a vital link in global supply chains.

More than 30 US states have over $1 billion in exports to China and there is over $500 billion in commercial engagements by US companies in China, they said.

On "Fox News Sunday," Trump said he does not feel "bound by a one-China policy unless we make a deal with China having to do with other things, including trade."

The inappropriate rhetoric came just days after Trump had a phone call with Taiwan leader Tsai Ing-wen, breaking decades of US diplomatic policy.

Chinese Foreign Ministry spokesperson Geng Shuang noted on Monday at a daily press briefing that China is "gravely concerned" about Trump's latest remarks. He cautioned that the Taiwan issue, concerning China's sovereignty and territorial integrity, involves China's core interest.