Emission and other input to run the CMAQ model for this particular study. This dataset is not publicly accessible because: Own by the collaborators. It can be accessed through the following means: send a request to the corresponding author. Format: netCDF format. This dataset is associated with the following publication: Yi, X., G. Sarwar, J. Bian, L. Huang, Q. Li, S. Jiang, H. Liu, Y. Wang, H. Chen, T. Wang, J. Chen, A. Saiz-Lopez, D. Wong, and L. Li. Significant Impact of Reactive Chlorine on Complex Air Pollution Over the Yangtze River Delta Region, China. JOURNAL OF GEOPHYSICAL RESEARCH: ATMOSPHERES. American Geophysical Union. Washington, DC, USA, 128: e2023JD038898, (2023).