Coupling and coordinated development of urban land use economic efficiency and green manufacturing systems in the Chengdu-Chongqing Economic Circle

• Measure the CCD of land use economic efficiency and green manufacturing system level • Construct a comprehensive and multi-dimensional green manufacturing system • Combine SBM model, the weighting method, the CCD model and convergence model • Spatially, the urban belt aggregation pattern exists in the Chengdu-Chongqing UA • In temporal distribution, the CCD begins to shift to the direction of convergence Industrial activity has been a powerful driver of urbanization and economic growth in China, which has often been at the expense of the natural environment. However, sustainable urban development requires improvements in the coupling and coordination of urban land use economic efficiency and green manufacturing systems. Based on statistical data from the Chengdu-Chongqing urban agglomeration, two index systems: urban land economic efficiency and green manufacturing systems; were developed to reveal the agglomeration's spatio-temporal sustainable development evolution from 2007 to 2019. A global SBM-DEA model was combined with a weighting method, a coupling coordination degree (CCD), and a convergence model, from which it was found that the CCD between the urban land use economic efficiency and green manufacturing system level in the Chengdu-Chongqing Economic Circle was in a slow growth stage. The government should formulate a scientific regional urban development strategy that condenses the special relationship between the two core cities and strengthens their driving effects to decrease the siphoning effect.