The trade war between the world's two largest economies rolled into a second round.
The dispute has continued to escalate, as Trump last week threatened to jack up the tariff rate on the next $200 billion in Chinese imports his administration plans to target to 25 percent, from the planned 10 percent.
The United States and China implemented tariffs on $34billion worth of each other's goods in July.
"Looking ahead, we expect export growth to cool in the coming months, though this will primarily reflect softer global growth rather than U.S. tariffs, the direct impact of which will continue to be mostly offset by the renminbi's (yuan's) recent depreciation", Capital Economics' Senior China Economist Julian Evans-Pritchard wrote in a note. They will take effect on August 23. President Donald Trump has suggested he may tax effectively all imports of Chinese goods, which reached more than $500 billion a year ago.
A Chinese Ministry of Commerce spokesperson wrote in a brief statement on Wednesday that the USA action was "once again overriding domestic law and global law", labelling it "a very unreasonable practice".
Over $480 million worth of Washington agriculture exports are impacted by Chinese tariffs.
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The office said the move is part of the US response to China's unfair trade practices related to the forced transfer of American technology and intellectual property.
The decision follows Washington's announcement Tuesday that it will implement levies on $16 billion of Chinese products starting from the same date. China immediately retaliated with similar tariffs on US goods, including soybeans, pork and poultry, which were created to hurt Trump voters in rural America.
The first $34 billion in USA tariffs, including on Chinese-made plastics equipment, began July 6. And Chinese regulators last month barred Qualcomm, a USA telecom leader, from completing its $44 billion acquisition of Netherlands-based NXP, which would have made it a more formidable competitor for Chinese companies.
March 1: President Donald Trump announcestariffs on all imports of steel and aluminum, including metals from China. "We have been very clear about the specific changes China should undertake".
The latest commentary from state media on Wednesday took a softer line after resorting to personal attacks against Trump earlier in the week, saying China could get through the storm but refrained from directly mentioning the US president.
This article was written by Damian Paletta, Amanda Erickson and David J. Lynch, reporters for The Washington Post.