Extraction and visualization analysis of key elements of tax preferential policies
Haishan GUAN, Yulong ZHENG, Bifan WEI, Zemin ZHANG, Hao YUE, Bin SHI, Bo DONG
Big Data Research . 2022, (5): 106 -123 .  DOI: 10.11959/j.issn.2096-0271.2022035