First high-speed train operating in mountains offers 4G coverage
A photo taken on Nov 8 shows telecom cables on Xi'an-Chengdu high-speed railway track in Qinling Mountains tunnel. [Photo/Chinanews.com] |
A photo taken on Nov 8 shows telecom cables on Xi'an-Chengdu high-speed railway track in Qinling Mountains tunnel. [Photo/Chinanews.com] |