President Donald Trump met Wednesday with South Korean President Lee Jae Myung in Gyeongju, wrapping up his Asia tour focused on securing major investment deals.

Trump praised South Korea as a valued ally and said a new trade agreement between the two nations would soon be finalized, following similar deals with Japan and Malaysia.

Lee asked the U.S. to ease restrictions on fuel for nuclear-powered submarines, while Trump touted what he called an “economic revolution” and predicted up to $22 trillion in new U.S. investments, Fox News has reported.

The visit came amid renewed North Korean missile activity and ahead of Trump’s scheduled meeting with Chinese President Xi Jinping.