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One of the most cutting-edge fields. Date research and analysis showed that dark matter in the universe is far more than the current share of humanity can be seen material, commonly observed in ordinary matter accounts for only 5% of the mass of the universe. Dark matter relates to the generation and evolution of the universe, some of the most fundamental issues. 'Similarly when relativity and quantum mechanics is about a hundred years before the birth and is now our understanding of the physical world once again at a crossroads. It is no exaggeration to say, to find and study dark matter, we will be following the Copernican heliocentric theory, Newton's law of universal gravitation, Einstein theory of relativity and quantum mechanics, it is recognized that the universe another major leap forward. 'Associate Professor, Department of Engineering Physics Yue Qian said. In addition to 'God', the international probe dark matter is more 'into the ground', that is probing the deep underground laboratory, so that you can reduce the ubiquitous cosmic ray interference on Earth. In this century, the international community have been carried out more than 20 experiments to detect dark matter, using a variety of techniques to look for dark matter. Especially in recent years, more competitive. From Italy, the United States, Germany, the experimental group has claimed to have discovered a suspected lightweight dark matter signals, which aroused strong interest in the scientific community and the public. Chinese scientists have conducted in the past in order to study dark matter, can only borrow underground laboratory abroad. China Jinping underground laboratory at the top of the rock covering 2.4 kilometers, is the world's deepest dark matter detection laboratory. After 2010 enabled, there are two experimental groups stationed, are leading CDEX Tsinghua University and Shanghai Jiaotong University experiment led PandaX experiments. Executive Vice President of Tsinghua University Professor Cheng Jianping China Jinping underground laboratory director, said from the development process over the past several decades the international underground laboratory can be seen, especially in the underground laboratory deep underground laboratory construction and development for a State to provide comprehensive major basic research platform, is a major national key basic research facilities. Over the past five years, the research progress of China in terms of dark matter quickly. 2014, CDEX experimental group received the current point electrode HPGe detector most flexible in the world