The Chinese government has vowed to take "firm and forceful measures" against US threats to expand tariff hikes.
The Chinese foreign ministry's comments follow the US trade representative's announcement it is preparing to impose 10% tariffs on a wider range of goods from fish sticks to French doors in the escalating trade dispute.
When asked what Beijing would do, foreign ministry spokeswoman Hua Chunying gave no details but said: "We will take firm and forceful measures."
The Chinese government has earlier said the latest threat was "totally unacceptable".
The commerce ministry said: "It is totally unacceptable for American side to publish a tariff list in a way that is accelerating and escalating."
It added: "The Chinese government will be forced to impose necessary countermeasures to protect its core interests."