The United States is optimistic about finding a way forward in its trade dispute with China, but it does not have a date scheduled for further talks as it assesses Beijing's response to the latest round of tariffs, a senior White House official said Friday.

The official said despite its protestations, China was well aware of U.S. demands it halt what Washington considers unfair trade practices. U.S. President Donald Trump has made clear his resolve on the issue, the official said, and the two sides remain in touch.

"We have been very clear in all of these meetings about what is ... required," the official said. "I am still optimistic that there is a positive way forward, and the president wants us to continue to engage to try to achieve a positive way forward."