Stunning drone footage has revealed the sheer scale of Chinese automaker BYD’s vast electric vehicle (EV) mega factory in Zhengzhou, Henan province, that is reportedly larger than the entire city of San Francisco. The sprawling facility, currently under development in eight phases, is set to cover an astonishing 50 square miles (32,000 acres) upon completion - surpassing the size of San Francisco (46.9 square miles). The BYD factory will also dwarf Tesla’s 4.5 square mile Gigafactory in Nevada, The Sun reported. BYD is emerging as one of Tesla’s biggest competitors, and its Zhengzhou mega factory will be over 10 times...