LANZHOU, July 16 (Xinhua) -- On the edge of the sprawling Gobi Desert lies the Chinese city of Yumen, a place that has worn many faces over the decades.
Once hailed as the "cradle of China's oil industry," it later made headlines as a "ghost town." Today, Yumen is reinventing itself as a green energy powerhouse, with arrays of glistening solar panels and towering wind turbines dominating its vast desert landscap
