The United States has often accused the People's Republic of China of attempting to unlawfully acquire U.S. military technology and classified information as well as trade secrets of U.S. companies[1][2] in order to support China's long-term military and commercial development.[3] Chinese government agencies and affiliated personnel have been accused of using a number of methods to obtain U.S. technology (using U.S. law to avoid prosecution), including espionage, exploitation of commercial entities, and a network of scientific, academic and business contacts.[4] Prominent espionage cases include Larry Wu-tai Chin, Katrina Leung, Gwo-Bao Min, Chi Mak, Peter Lee, and Shujun Wang.[5] The Ministry of State Security (MSS) maintains a bureau dedicated to espionage against the United States, the United States Bureau.
In addition to traditional espionage, China partners civilian-in-name Chinese companies with American businesses to acquire technology and economic data[6] and uses cyber spying to penetrate the computer networks of U.S. businesses and government agencies, such as the 2009 Operation Aurora and the 2015 Office of Personnel Management data breach.[7] U.S. law enforcement officials have identified China as the most active foreign power involved in the illegal acquisition of American technology.[8][9]
During its martial law period (1949–1987), the Republic of China government on Taiwan spied on its citizens abroad, especially in the United States.