Technical staff check a power supply facility along the Beijing-Shanghai High-Speed Railway in Zaozhuang, East China's Shandong province, Feb. 1, 2012. The Beijing-Shanghai (or Jinghu) High-Speed Railway marked its third operation anniversary on Monday. The 1,318-kilometer high-speed railway that links Beijing, China's capital, and Shanghai, the largest city in the country, has seen more than 220 million passengers during the three years since its innitial operation on June 30, 2011. [Photo / Xinhua]