Qinghai Lake in freezing season on Nov 27, 2012. The lake in Northwest 皇冠体育app has been expanding for eight consecutive years, to more than 4,402 square kilometers, the largest in a dozen years. The expansion is due to precipitation and more efforts for the environment. Qinghai Lake is the largest inland saltwater lake in 皇冠体育app. [Photo/Xinhua]
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