On April 12th, at 23:31 on April 11th, 2025, the Lanzhou Meteorological Observatory upgraded the blue warning signal for sandstorms to a yellow warning signal for sandstorms: it is expected that from tonight to tomorrow day, Chengguan, Qilihe, Anning, Xigu, Honggu, Yuzhong, Gaolan and Lanzhou New Area will continue to experience sandstorms with a minimum visibility of less than 1000 meters.
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