China warned “there is no winner in a trade war” after President Trump’s chief strategist called for taking a tougher economic stand against the country, according to a report on Thursday.

“There is no winner in a trade war. We hope the relevant people can refrain from dealing with a problem in the 21st century with a zero-sum mentality from the 19th or the 20th century​,​”​ China’s foreign ministry spokeswoman Hua Chunying said, the Associated Press reported.​

Her remarks come after Steve Bannon told American Prospect in an interview published online Wednesday that the US is in an “economic war with China.”

Bannon recommended pursuing a trade investigation of Beijing’s technology policies and​ taking​ anti-dumping action over Chinese exports of steel and aluminum.

“We’re going to run the tables on these guys. We’ve come to the conclusion that they’re in an economic war and they’re crushing us,” he told the publication.