US Secretary of State Mike Pompeo has said that the United States is seeking to “level the playing field” with China after what he calls decades of unfair trade practices.

After holding talks with his Dutch Foreign Minister Stef Blok in The Hague on Monday, Pompeo said that President Donald Trump wants to insure that Chinese companies and American companies are doing business on equal terms.

“We’re very concerned that Western companies, American companies and others that enter the Chinese markets aren’t treated the same way that Chinese companies are treated when they enter those Western markets,” Pompeo said.

Trump initiated what is effectively a trade war with China last year, when he first imposed unusually heavy tariffs on imports from the country. Since then, the world’s two largest economies have exchanged tariffs on more than $360 billion in two-way trade.