Chinese stock markets tumbled today after US President Donald Trump threatened new tariffs on China, putting their trade deal in doubt.
He said on Twitter the US would more than double tariffs on Chinese goods on Friday and will introduce fresh tariffs.
Recent comments suggest both sides were nearing a trade deal.
A Chinese delegation is due in Washington this week for talks aimed at ending the trade war.
US media has reported that China is now considering canceling those talks, led by Vice-Premier Liu He, that was scheduled to resume on Wednesday.
Some reports said the Chinese were due to send a 100- man delegation to the negotiations.