Some of the Chinese military institutions that top US military officials have visited:
* Second Artillery Force Headquarters
US Defense Secretary Donald Rumsfeld visited in October 2005.
US Defense Secretary Robert Gates visited in January 2011.
Mike Mullen, chairman of the US Joint Chiefs of Staff, visited in July 2011.
* Submarine base of the East China Sea Fleet
Mike Mullen, chairman of the US Joint Chiefs of Staff, visited in July 2011.
* PLA Armored Forces Engineering Academy
US Defense Secretary Leon Panetta visited in September 2012.
* PLA Navy North Sea Fleet headquarters
US Defense Secretary Leon Panetta visited in September 2012.
* Fourth helicopter regiment of the Army Aviation Corps
Chairman of the US Joint Chiefs of Staff Martin Dempsey visited in April 2013.
* PLA National Defense University
Chairman of the US Joint Chiefs of Staff Martin Dempsey visited in April 2013.
US Defense Secretary Chuck Hagel is expected to visit on Tuesday.