The US has announced its plans to impose taxes on a further $US200 billion ($270 billion) worth of Chinese imports, in retaliation for China's retaliation to America's first round of tariffs.
The office of US Trade Representative Robert Lighthizer has released a list of Chinese products, running to almost 200 pages, that will potentially be hit with a 10 per cent import tax as early as September.
This builds on 25 per cent tariffs on $US34 billion ($46 billion) worth of Chinese imports into the US that took effect at midnight on Friday, and carries out US President Donald Trump's threat to respond to any Chinese retaliation to those taxes.
Chinese authorities implemented tit-for-tat tariffs on key US exports into China, including some major agricultural products.
The US is planning to implement 25 per cent tariffs on a further $US16 billion ($22 billion) worth of Chinese imports within the next fortnight.
Mr Lighthizer said the products targeted by the tariffs are those that benefit from China's industrial policy and forced technology transfer.
"For over a year, the Trump Administration has patiently urged China to stop its unfair practices, open its market, and engage in true market competition," he said in a statement.
"We have been very clear and detailed regarding the specific changes China should undertake.
"Unfortunately, China has not changed its behaviour — behaviour that puts the future of the US economy at risk.
"Rather than address our legitimate concerns, China has begun to retaliate against US products. There is no justification for such action."
However, Mr Lighthizer also opened the door again to a negotiations with China before the latest round of tariffs take effect.
"As in the past, the United States is willing to engage in efforts that could lead to a resolution of our concerns about China's unfair trade practices and to China opening its market to US goods and services," he added.
"In the meantime, we will remain vigilant in defending the ability of our workers and businesses to compete on a fair and reciprocal basis."
The Office of the US Trade Representative is seeking submissions on the latest proposed tariffs and will conduct hearings in late August, making September the earliest possible implementation date for the new import taxes.