Children have a sleep in parents' arms on train 3663, which runs from east China's Shanghai to Chengdu, capital of southwest China's Sichuan Province, on Sept. 9, 2015. The Spring Festival, or the Chinese lunar New Year which starts from Feb. 19 this year, is known as the world's biggest migration, with millions of people traveling vast distances for family reunions. (Xinhua/Ding Ting) |