China warned the Trump administration on Tuesday against reigniting trade tension by restoring tariffs on its goods next month, and threatened to retaliate against nations that strike deals with the United States to cut China out of supply chains.

China cautioned the Trump administration against re-escalating trade tensions by re-imposing tariffs on Chinese goods next month. Beijing also threatened retaliation against countries that forge deals with the United States aimed at excluding China from supply chains.

On July 7th Donald Trump, America’s president, sent letters to Japan, South Korea and a dozen other trading partners pushing back the deadline for their trade talks from July 9th to August 1st and tweaking the tariffs they will face if talks fail.