Archived from the original (PDF) on 2017-07-21. Retrieved 2018-02-02. "环境空气质量指数(AQI) 技术规定(试行)" [Technical Regulation on Ambient Air Quality Index (on trial)]...
66 KB (5,121 words) - 03:37, 13 May 2025
tj.focus.cn (in Simplified Chinese). Retrieved 2018-10-05. 廊坊空气质量指数AQI_PM2.5月统计历史数据_中国空气质量在线监测分析平台历史数据. www.aqistudy.cn (in Simplified Chinese). Retrieved...
9 KB (681 words) - 23:22, 14 April 2025