Yongyong Wei received his BS degree from Sun Yat-sen University, China, in 2010 and his MS degree in Computer Application Technology from the University of Chinese Academy of Sciences, China, in 2013. He worked in SAP Labs China from 2013 to 2017. He is now working toward a PhD degree on Mobile Computing under the supervision or Dr. Rong Zheng at McMaster University, Canada. His current research interests include mobile computing, indoor localization and machine learning.