Mark Kelton, a former head of counter-intelligence at the CIA, suggests that the scale of current Chinese espionage against America's government at least matches Soviet activity in the 1930s.

中央情报局前反情报负责人马克·凯尔顿 (Mark Kelton) 表示，目前中国针对美国政府的间谍活动规模至少与 1930 年代苏联的活动相当。