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减负降本数字化改革涉及的杭州海关减免税汇总信息，包含：主键ID,年月,政策ID,地市代码,地市名称,区县代码,区县名称,行业门类,行业门类代码,行业大类,行业大类代码,月度减负/降本金额（元）,企业数量,更新时间等信息Summary information of duty reduction and exemption under Hangzhou Customs related to the digital reform of burden and cost reduction, including: Primary Key ID, Year-Month, Policy ID, Prefecture-level City Code, Prefecture-level City Name, District/County Code, District/County Name, Industry Sector, Industry Sector Code, Industry Major Category, Industry Major Category Code, Monthly Burden and Cost Reduction Amount (CNY), Number of Enterprises, Update Time, etc.