First high-speed train operating in mountains offers 4G coverage
A railway staff member shows the equipment used for telecommunication on Xi'an-Chengdu high-speed railway line in Qinling Mountains tunnel. [Photo/Chinanews.com] |
A railway staff member shows the equipment used for telecommunication on Xi'an-Chengdu high-speed railway line in Qinling Mountains tunnel. [Photo/Chinanews.com] |