Has the United States participated in the Boao Summit?

The United States has sent senior representatives to attend the annual meeting of Boao Forum for Asia. According to relevant public information, in 20 18, Wilbur Ross, US Secretary of Commerce, attended the Boao Forum for Asia and delivered a speech. However, due to the influence of the Sino-US trade war, American government officials have gradually reduced the frequency of participating in the Boao Forum for Asia in recent years.