Policeman Lu Rifeng patrols at Pingxiang station in Pingxiang, southwest China's Guangxi Zhuang Autonomous Region, Feb. 8, 2015. The 40-day travel frenzy known as "Chunyun", the hectic period surrounding Spring Festival, which falls this year on Feb. 19, began on Feb. 4 and will last until March 16. (Xinhua/Ning Jian)

Workers check the tracks at Liuzhou station, southwest China's Guangxi Zhuang Autonomous Region, Feb. 5 , 2015. The 40-day travel frenzy known as "Chunyun", the hectic period surrounding Spring Festival, which falls this year on Feb. 19, began on Feb. 4 and will last until March 16. (Xinhua/Liu Zheng)

Workers of Guizhou Power Grid check along the Guiyang-Guangzhou railway in Congjiang, southwest China's Guizhou Province, Feb. 8, 2015. The 40-day travel frenzy known as "Chunyun", the hectic period surrounding Spring Festival, which falls this year on Feb. 19, began on Feb. 4 and will last until March 16. (Xinhua/Liang Guangyuan)

Greaser Ye Suihua carries two sand bags along a railway at a station in Shangrao, east China's Jiangxi Province, Feb. 9, 2015. The 40-day travel frenzy known as "Chunyun", the hectic period surrounding Spring Festival, which falls this year on Feb. 19, began on Feb. 4 and will last until March 16. (Xinhua/Zhuo Zhongwei)