1. State Key Laboratory of Internet of Things for Smart City (SKL-IOTSC), University of Macau, Macau, China
2. Department of Computer Science and Engineering, Southern University of Science and Technology, Shenzhen, China
3. Manifold Tech Limited, Hong Kong SAR, China
4. Center for Cloud Computing, Shenzhen Institute of Advanced Technology (SIAT), Chinese Academy of Sciences, Shenzhen, China