Here is a link to a website I found that contains declassified documents that focus on US- China interaction from 1969- present. Many of these documents are dense, however excerpts can be used so students can understand U.S. responses to the Chinese government crack down in Tiananmen Square. The website is easy to navigate and all the declassified documents appear at the bottom. http://http://www.gwu.edu/~nsarchiv/nsa/publications/china-us/