The roots of the dispute come from US president Donald Trump’s “America first” project to protect the US’ position as the world’s leading economy, while encouraging businesses to hire more workers in the US and to manufacture their products there.

Trump complains of a large trade deficit with China, which he views as a symbol of the US’s decline as a manufacturing powerhouse. Chinese imports to the US totalled $539.5bn last year, while $120.3bn was sold the other way – leaving a trade deficit of $419.2bn.

The president has accused Beijing of “unfair” trade policies, including allowing the theft of US companies’ intellectual property. The threat of import tariffs on Chinese goods is being used as leverage in talks where Trump is seeking changes to Beijing’s trade policy.

Tariffs have been imposed by Washington on some Chinese goods sold in the US for about a year. They came on top of broader tariffs used by Trump that have hit China and other trading partners such as the EU, Canada and Mexico, on goods including steel and aluminium.

In May 2019 the US president further ratcheted up existing import tariffs of 10% on $200bn (£153bn) of Chinese goods sold in the US to 25%, hitting everything on a long list of products. Trump has previously warned that 25% tariffs could be slapped on a further $325bn of goods – which would mean all Chinese imports being covered by tariffs.

However, talks in November 2019 aimed at easing tensions were welcomed as the beginning of a thaw in the trade war between the two nations.

Richard Partington and Jasper Jolly