5UIC. High speed lines in the World[EB/OL]. 2014-09. http://uic.org.
6Gerald Ollivier, Jitendra Sondhi, Nanyan Zhou. High-speed railways in China: A look at construction costs[EB/OL]. 2014-07-01. http://documents. worldbank.org/curated/en/2014/12/23031378/high- speed-railways-china -look-traffic.