Sima Nan, a Chinese communnist party member who has obtained a US immigration visa, has recently been reported by using his right of entering hearings to film the Chinese dissidents and provide the film clips back to China to facilitate the Chinese security institutes' hunt down action of the Chinese dissidents. This action was against the US immigration law and the related federal laws.This will also create serious outcome on the US national security environment. The evidences of this event can be obtained from the links below, with background information of Sima Nan:
http://www.secretchina.com/news/13/12/08/522825.html
http://en.wikipedia.org/wiki/Sima_Nan
http://kristinasaid.wordpress.com/tag/persecution-of-dissidents/page/7/
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