TheopeningoftheBeijing—Zhangjiakouhigh-speedrailwayt...
问题详情： TheopeningoftheBeijing—Zhangjiakouhigh-speedrailwaytookplaceinDecember,2019.TherailwayisamilestoneinChina’srailwaydevelopmentbecauseithasusedthelatesttechnologiesinrailwaybuilding.Ther...