Sun Xiaokai watches his wife Song Mengzhu go in a bullet train in Jiaohe Train Station, northeast China's Jilin Province, Jan. 26, 2016. Young couple Song Mengzhu and Sun Xiaokai, both railway workers of Jilin, are busy working to serve the passengers during the Spring Festival travel rush, which kicked off on Jan. 24. Spring Festival, China's most important holiday centering on family reunions, will fall on Feb. 8.[Photo/Xinhua]