Jie Tang is an associate professor with the Department of Computer Science and Technology, at Tsinghua University. His interests include social network analysis, data mining, and machine learning. He has published more than 100 journal/conference papers and holds 10 patents. He served as PC Co-Chair of WSDM'15, ASONAM'15, ADMA'11, SocInfo'12, KDD-CUP Co-Chair of KDD'15, Poster Co-Chair of KDD'14, Workshop Co-Chair of KDD'13, Local Chair of KDD'12, Publication Co-Chair of KDD'11, and as the PC member of more than 50 international conferences. He is the principal investigator of National High-tech R&D Program (863), NSFC project, Chinese Young Faculty Research Funding, National 985 funding, and international collaborative projects with Minnesota University, IBM, Google, Nokia, Sogou, etc. He leads the project Arnetminer.org for academic social network analysis and mining, which has attracted millions of independent IP accesses from 220 countries/regions in the world. He was honored with the Newton Advanced Scholarship Award, CCF Young Scientist Award, NSFC Excellent Young Scholar, and IBM Innovation Faculty Award. Juanzi Li obtained her Ph.D. degree from Tsinghua University. She is now a full professor at Tsinghua University. Her main research interest is to study the semantic technologies by combining the Natural Language Processing, Semantic Web and Data Mining. She is the vice director of Chinese Information Processing Society of Chinese Computer Federation in China. She is the principal investigators of many key projects supported by the Natural Science Foundation of China (NSFC), the national basic science research program and international cooperation projects. She has published over 120 papers in many international journals and conferences such as TKDE, SIGIR, SIGMOD, SIGKDD, IJCAI, etc.