US President Donald Trump has accused China of 'breaking the deal' in its trade talks, casting further doubt of an agreement between the two.
The two economic superpowers have been in and out of talks over a trade deal for months as they aim to bring an end to the ongoing trade war.
Trump has said he will double trade tariffs on $200 billion worth of Chinese goods on Friday as a result, which China said it would react with "necessary countermeasures".
Despite the step up in hostility, the US and China are set to resume talks on Thursday.
Mr Trump told a rally in Florida: "They broke the deal... They can't do that. So they'll be paying."
US Trade Representative Robert Lighthizer later stressed that a deal is still possible, despite reiterating the President's claims that they backtracked on agreements.
On Twitter, Trump claimed China was attempting to delay negotiations until after the 2020 presidential election in the hope that they could negotiate with "one of the very weak Democrats" and "continue to rip off" the US for years to come.
"The escalation of trade friction is not in the interests of the people of the two countries and the people of the world," the Chinese Commerce Ministry said in a statement.
"The Chinese side deeply regrets that if the US tariff measures are implemented, China will have to take necessary countermeasures."