Why Does the Qinghai-Tibet Railway Still Use American Locomotives? When Will Domestic Locomotives Be "On Duty"?The Qinghai-Tibet Railway, spanning the Qinghai-Tibet Plateau and known as the "Roof of the World", has been in operation for 18 years since its opening in 2006. This railway, considered a marvel of Chinese engineering, connects Xining and Lhasa, bringing once-inaccessible Tibet closer to mainland China...