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— Wang Wei No dust is raised on the road wet with morning rain; The willows by the hotel look so fresh and green. I invite you to drink a cup of wine again; West of the Sunny Pass no more friends will be seen.
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In the late Ming Dynasty (1368-1644), the Qingzhou and Yanzhou areas of Shandong Province were infested with swarms of locusts. The locusts gradually moved to Yixian County. The county magistrate was very worried about the matter.