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Photo taken on July 6, 2019 shows a production line at a subsidiary of Beijing Electric Vehicle Co., Ltd. (BJEV), a new energy vehicle producer, in Huanghua city of Cangzhou, north China's Hebei Province. China has built the world's largest network of charging facilities for electric vehicles, as 1 million charging piles had been completed by the end of June. (Xinhua/Yang Shiyao)