The Commerce Ministry on Wednesday gave no details, but Beijing responded to last week's USA tariff hike on $34 billion of imports from China by increasing its own duties on the same amount of American goods.
The Trump administration previously said it "erred" in supporting China's membership of the WTO because it has "proven to be ineffective in securing China's embrace of an open, market-oriented trade regime", according to a US Trade Representative report released in January.
This comes on top of a 25% tariff on $34 billion worth of imports from China that came into effect last week.
Beijing retaliated for the US move by hiking tariffs on American goods including soybeans, whiskey and electric cars.
Beijing has said it would hit back against Washington's escalating tariff measures, including through "qualitative measures", a threat that US businesses in China fear could mean anything from stepped-up inspections to delays in investment approvals and even consumer boycotts.
"Tonight's announcement appears reckless and is not a targeted approach", Senate Finance Chairman Orrin Hatch, R-Utah, said in a statement.
More broadly, American officials worry Chinese government plans such as "Made in China 2025", which calls for creating competitors in robots, biotech, artificial intelligence and other fields, might erode USA technology leadership and prosperity. "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 USA goods and services", Lighthizer said in the statement.
United States officials released a list of thousands of Chinese imports the administration wants to hit with the new tariffs, including hundreds of food products as well as tobacco, chemicals, coal, steel and aluminium. Each side is planning tariffs on a further $16 billion in goods that would bring the totals to $50 billion.
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Even so, the USA dollar hit a six-month high against the safe-haven Japanese yen as currency traders put trade worries aside and focused on Labor Department data that showed producer prices rising more than expected.
It seems that the U.S. is escalating the scale of this trade friction.
Hong Kong's main index shed 1.3 percent.
Jack Ablin, chief investment officer for Cresset Wealth Advisors, said the tariffs can have big effects: A tariff on an import from one country can lead to broad price increases for similar items, and rising taxes and costs might cause companies to change their supply lines in less efficient ways.
Administration officials said a two-month process will allow the public to comment on the proposed tariffs before the list is finalized. Many market watchers are concerned the trade war will derail the expansion.
"Our president is going to keep fighting for trade deals that are free and fair and reciprocal", Pence said.
The Ministry of Commerce's Li Chenggang said the only correct choice for China-U.S. relations was cooperation.