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According to Observation and Forecasting Levels of Haze ( QX/T113 2010 ) issued by the China Meteorological Administration, the Xinjiang meteorological Service developed the Operational Automatic Identification System of Fog/Haze for Xinjiang, which has the capabilities of automatically identifying fog, haze, and sunny weather phenomenon and displaying such parameters of atmospheric status as PM25 and aerosol absorption properties of automatic meteorological stations in real time on line over 24 hours.The system provides an auxiliary fog/haze identification tool for meteorological observers and an on line verification tool of fog/haze weather forecast quality for weather forecasters,which has been put to use in weather stations in Urumqi and performs satisfactorily.