President Donald Trump greets CEO of Ford Motor Company Mark Fields during a meeting with auto industry leaders in the Roosevelt Room of the White House on January 24, 2017 in Washington, DC.

Ford Motor CEO Mark Fields is feeling optimistic about the outlook for U.S.-China relations, the executive told CNBC on Saturday, a day after the conclusion of a summit between President Donald Trump and Chinese President Xi Jinping.

On Friday, Trump said that the two leaders had made progress on tough bilateral issues as both men met at the president's Mar-a-Lago estate in Florida. Trump, who has previously taken aim at China's currency and trade policies and made protectionism a centerpiece of his economic policy, hailed Xi's visit in a tweet early Saturday.