ข้อมูลคุณภาพอากาศจัดทำโดย: the Environmental Protection Department of Shandong Province (山东省环境保护厅) (sthj.shandong.gov.cn) and the Weather Underground (wunderground.com) and the Environmental Protection Department of Shandong Province (山东省环境保护厅) (sdein.gov.cn)