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Foreigners Run Afoul of China's Tightening Secrecy Rules

Science  25 Jan 2013:
Vol. 339, Issue 6118, pp. 384-385
DOI: 10.1126/science.339.6118.384

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Summary

Between 2006 and 2011, authorities pursued nearly 40 illegal mapping and surveying cases, according to state press reports. Several have involved scientists, one of whom is serving a long prison sentence. And the terrain is likely to get even more treacherous.