The United States and China implemented tariffs on $34billion worth of each other's goods in July.
China has repeatedly warned it will strike back against any further punitive measures by Trump, saying the United States is threatening the global free trade order with its protectionism.
August 20-23, 2018: The Section 301 Committee will convene a public hearing in the main hearing room of the U.S. International Trade Commission, 500 E Street SW, Washington DC, 20436 beginning at 9:30 a.m.
Those $16 billion in tariffs complete what is considered President Donald Trump's first round of tariffs on China, totaling $50 billion.
A Chinese Ministry of Commerce spokesperson wrote in a brief statement on Wednesday that the U.S. action was "once again overriding domestic law and worldwide law", labelling it "a very unreasonable practice".
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Trump's aggressive trade actions have drawn sharp criticism from business and from members of his own Republican party, as well as numerous warnings that an continuing to ramp up the trade war will harm the USA and global economies.
China's 25 percent tariffs will apply to US products such as coal, gasoline, vehicles, motorcycles and medical equipment.
The additional list of 279 product lines to be hit later this month was announced by the United States Trade Representative (USTR) on Tuesday.
Among the products removed from the earlier list on $16 billion of imports were shipping containers, including those used by freight companies.
The new list covers products such as semiconductors, electronics, plastics, and railway equipment. That's 24% of all Washington exports according to the Washington Department of Agriculture.
Over the weekend, Trump said he had the upper hand in the trade war, while Beijing responded through state media by saying it was ready to endure the economic fallout.