His research focus is to find effective and efficient solutions for managing, integrating, and analyzing large-scale complex data for business, scientific and personal applications. He has been working in the area of spatiotemporal and multimedia databases, data mining, data quality management, high-performance query processing, big data analytics, and machine learning, co-authored over 350 research papers. He received the Best Paper Awards of WISE 2012&2013, ICDE 2015&2019, DASFAA 2016 and ADC 2019.