HUAIVG Jingzheng, is a Ph.D. candidate in the Key Laboratory of Quantum Information at University of Science and Technology of China (USTC). He received his B.E. degree from Shanghai Jiao Tong University (SJTU), China, in 2006. His research interests include quantum key distribution and quantum information theory. YIAI Zhenqiang, is an Associate Professor in the Key Laboratory of Quantum Information at University of Science and Technology of China (USTC). He received his Ph.D. degree from USTC in 2010. His research interests include quantum key distribution and quantum information science. *The corresponding author. Ernail: yinzheqi@mail, ustc.edu.cn CHEN Wei, is an Associate Professor in the Key Laboratory of Quantum Information at University of Science and Technology of China (USTC). He received his Ph.D. degree from USTC in 2008. His research interests include quantum key distribution and quantum cryptography devices. *The corresponding author. Email: kooky@mail, ustc.edu.cn WANG Shuang, received his Ph.D. degree from Uni-versity of Science and Technology of China in 2011. He is a post-doctoral in the Key Laboratory of Quan-tum Information, CAS. His research interests include quantum key distribution systems, quantum random number generator, and quantum cryptography net- works. LI Hongwei, received his Ph.D. degree from Univer sity of Science and Technology of China in 2011. He is a post-doctoral in the Key Laboratory of Quantum information, CAS. His research interests include quantum cryptography theory and quantum random number generator. GUO Guangcan, was born on Dec. 9th, 1942 at Hui'an, Fujian province. Prof. Guo was elected as Academician of Chinese Academy of Sciences in 2003 and was elected as Academician of the World Academy of Sciences for the Advancement of Science in Developing Countries (previously named the Academy of Sciences for the Developing World) in 2009. Prof. Guo's major research interests are in the theoretical and experimental study of quantum op-tic