A policewoman introduces tourism safety knowledge at a railway station in Chongqing, southwest China, Jan. 13, 2017. About 2.98 billion trips are expected to be made during China's 2017 Spring Festival travel rush between Jan. 13 and Feb. 21. The Spring Festival, or Chinese Lunar New Year, falls on Jan. 28 this year. The festival is the most important occasion for family reunions. (Xinhua/Tang Yi)