Home / Standards / GB/T 30521-2025 GB/T 30521-2025 Active Statistical rules for trade exhibition 经济贸易展览会数据统计规则 Standard Type GBT ICS 01.020 CCS A22 Status 现行 Issue Date 2025-05-30 Implementation 2025-05-30 Responsible Dept 国家标准委 Drafting Unit N/A