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       The Beijing-Zhangjiakou High-speed Railway is a key national project and an important transportation facility for the 2022 Beijing Winter Olympics. It is the world's first high-speed railway constructed with intelligent technology on the entire line. The Beijing-Zhangjiakou High-speed Railway adopts the Beidou Navigation Satellite System independently developed by China for the first time. It is the first high-speed railway in the world to achieve an autonomous driving speed of 350 kilometers per hour.