In this photo released by China's Xinhua news agency, a high-speed train G802 leaves for Beijing from Shijiazhuang, capital of north China's Hebei province, on Dec. 26, 2012. China has opened the world's longest high-speed rail line, which runs 2,298 kilometers (1,428 miles) from the country's capital in the north to Guangzhou, an economic hub in the Pearl River delta in southern China. (Associated Press/Xinhua)