China said Tuesday it would “fight to the end” and take countermeasures against the United States to safeguard its own interests after President Donald Trump threatened an additional 50% tariff on Chinese imports.

The Commerce Ministry said the U.S.‘s imposition of “so-called ‘reciprocal tariffs’” on China is “completely groundless and is a typical unilateral bullying practice.”

China, the world’s second-largest economy, has announced retaliatory tariffs and the ministry hinted in its latest statement that more may be coming.

“The countermeasures China has taken are aimed at safeguarding its sovereignty, security and development interests, and maintaining the normal international trade order. They are completely legitimate,” the ministry said.

“The U.S. threat to escalate tariffs on China is a mistake on top of a mistake and once again exposes the blackmailing nature of the U.S. China will never accept this. If the U.S. insists on its own way, China will fight to the end,” it added.

Trump’s threat Monday of additional tariffs on China raised fresh concerns that his drive to rebalance the global economy could intensify a financially destructive trade war. Stock markets from Tokyo to New York have become more unstable as the tariff war worsens.

Trump’s threat came after China said it would retaliate against U.S. tariffs he announced last week.

“If China does not withdraw its 34% increase above their already long term trading abuses by tomorrow, April 8th, 2025, the United States will impose ADDITIONAL Tariffs on China of 50%, effective April 9th,” Trump wrote on Truth Social. “Additionally, all talks with China concerning their requested meetings with us will be terminated!”

If Trump implements his new tariffs on Chinese products, U.S. tariffs on Chinese goods would reach a combined 104%. The new taxes would be on top of the 20% tariffs announced as punishment for fentanyl trafficking and his separate 34% tariffs announced last week. Not only could that increase prices for American consumers, it could also give China an incentive to flood other countries with cheaper goods and seek deeper relationships with other trading partners, particularly the European Union.