A police officer helps a child to get on a train at Yuncheng Railway Station in Yuncheng, north China's Shanxi Province, Feb. 21, 2018. Rising trips have been witnessed on Wednesday, the last day of week-long Chinese Lunar New Year holiday, as people return to work from their hometown. (Xinhua/Bao Dongsheng)

A railway station staff member directs the passengers at Hengyang Railway Station in Hengyang, central China's Hunan Province, Feb. 21, 2018. Rising trips have been witnessed on Wednesday, the last day of week-long Chinese Lunar New Year holiday, as people return to work from their hometown. (Xinhua/Cao Zhengping)

An officer directs traffic at a bus station in Hongze District of Huaian City, east China's Jiangsu Province, Feb. 21, 2018. Rising trips have been witnessed on Wednesday, the last day of week-long Chinese Lunar New Year holiday, as people return to work from their hometown. (Xinhua/Chen Liang)

A railway station staff member reports the information of train services at Hengyang Railway Station in Hengyang, central China's Hunan Province, Feb. 21, 2018. Rising trips have been witnessed on Wednesday, the last day of week-long Chinese Lunar New Year holiday, as people return to work from their hometown. (Xinhua/Cao Zhengping)