Passengers carrying luggage walk out of Nanjing Railway Station in Nanjing, capital of east China's Jiangsu Province, Feb. 16, 2012. A total of 3.16 billion passenger trips are expected during this year's 40-day Spring Festival holiday travel rush, which will end on Feb. 16. The Spring Festival holiday, also known as the beginning of the Chinese Lunar New Year, is the country's biggest and most important holiday. [Xinhua]