The U.S. Trade Representative’s Office issued its target list after Beijing announced tariff hikes Monday on $60 billion of American goods in their spiraling dispute over Chinese technology ambitions and other irritants. Chinese authorities were reacting to President Donald Trump’s surprise decision last week to impose punitive duties on $200 billion of imports from China.

“China will fight to the finish,” said a foreign ministry spokesman, Geng Shuang.

“We have the determination and capacity to safeguard our interests,” Geng said. “China’s countermeasures have shown our determination to safeguard the multilateral trade system.”

Trump downplayed the standoff that sent global markets plummeting to start the week, calling it “a little squabble” between friends.