Known as the "sapphire on plateau," Qinghai Lake is the largest inland saltwater lake in China. Key to maintaining the ecological balance in western China, it acts as a natural barrier for controlling the eastward spread of desertification. As temperatures drop, the lake enters its frozen period in mid-December and begins to thaw in April. It looks like a dazzling gem embedded on the northeastern part of the Qinghai-Tibet Plateau.
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