“…However, the studies on the urbanization effect on energy-related CO 2 emission in Chinese provinces are incomplete and fragmented. This fragmentation likely stems from the fact that researchers are interested in a broad range of specific questions in particular research contexts and have tackled a variety of sector-specific [6,9,17,18,25,27] and region-specific research [17,18,21,24,32,33], for example, the carbon emission trading in Guangdong Province [20], the energy efficiency in Shandong Province [7], and the industrial restructuring in Jiangsu Province [29]. The fragmented research landscape raises up many fundamental questions for scholars of this field.…”