Ling-Jyh Chen is the Research Fellow in Institute of Information Science of Academia Sinica, and the Director of Department of Information Technology Services of Academia Sinica. He received the Ph.D. degree in computer science from University of California at Los Angeles in 2005. His research interests are networked sensing systems, Internet of things, and big data analytics. His most recent project is the AirBox project, which is a participatory sensing project for low-cost PM2.5 monitoring. The project is based in Taiwan and operated in a grassroots fashion with more than 20,000 deployments across 59 countries till now. The data portal of this project has become the most popular data source about PM2.5 distributions in Taiwan.