Dongfan 'Greg' Chung, who worked with Boeing and Rockwell International, was accused of providing information on the space shuttle and Delta IV rocket.
U.S. District Judge Cormac J. Carney in Santa Ana imposed a 188-month prison term on Dongfan "Greg" Chung, 73, a naturalized U.S. citizen who lives in Orange.
Chung, who worked at Boeing's Huntington Beach plant, denied being a spy and said he was gathering documents for a book, not for espionage. His attorneys argued that much of the material was already available on the public record.
Between 1985 and 2003, Chung made trips to China to deliver lectures on technology involving the space shuttle and other programs, the government said. During those trips, Chung met with Chinese government officials, including military agents. (Source: Patrick J. McDonnell, Los Angeles Times, Feb 9, 2010).