China's high-speed rail traffic to grow within 20 years

Train attendant Li Jia waves as a high-speed bullet train which goes on a test run on the Gansu section of the newly built Lanxin (Lanzhou-Urumqi) High-Speed Railway leaves Lanzhou West Railway Station in Lanzhou, capital of Northwest China's Gansu province, Dec 10, 2014. [Photo/Xinhua]