New and updated reports on China and Taiwan from the Congressional Research Service include the following (all pdf).
China-U.S. Trade Issues, August 10, 2011
U.S.-Taiwan Relationship: Overview of Policy Issues, August 4, 2011
China’s Currency: A Summary of the Economic Issues, August 3, 2011
Taiwan: Major U.S. Arms Sales Since 1990, August 2, 2011
U.S.-China Military Contacts: Issues for Congress, July 26, 2011
Human Rights in China and U.S. Policy, July 18, 2011