The rapid-fire shots of tariffs and import curbs hearken back to Trump’s first term in office, when the U.S. and China engaged in a trade war that spanned most of Trump’s first four years in office and was continued to a certain extent under his successor, Joe Biden.

US President Donald Trump has suspended tariffs on small packages from China, after his sudden order ending duty-free treatment for shipments worth less than $800 (£645) left the US postal service and other agencies scrambling to comply.

China hits back with export controls, Canada and Mexico remain under threat. USPS closes then reopens "de minimis" small package loophole