Shielding against electromagnetic weapons is the key to protection of commanding and communication systems in modern warfare. Previously, the Chinese Army did not have the technology in this critical area. In 2001, the Construction Engineering Institute of the Army’s General Logistics Department started research work. With help from the Nonferrous Metal Research Institute, the project team delivered the shielding cloth after six years by utilizing technologies from areas of camping construction, special textile, electromagnetic shielding and environmental control. The distance for information leakage was reduced from 1000 meters down to 1 meter.
Source: Global Times, November 20, 2009
http://mil.huanqiu.com/china/2009-11/638437.html