Today Xinjiang Uygur and Ninyxia Hui autonomous reglons, as wel as Gansu, Qinghai and Sheanxi provinces in northwest China have gradually become the country's important energy bases and the focus of...
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Today Xinjiang Uygur and Ninyxia Hui autonomous reglons, as wel as Gansu, Qinghai and Sheanxi provinces in northwest China have gradually become the country's important energy bases and the focus of...