Technical malfunctions in Zhangjiazhuang, Hebei province, led to delays on Sunday, as seen on a screen at Beijing Railway Station. [Photo by Liu Chang/For China Daily]

Chinese passengers crowd the Wuhan Railway Station during the Spring Festival travel rush in Wuhan city, Central China's province, on Feb 8, 2019. [Photo/IC]

Travelers make their way home on Sunday, the last day of the Spring Festival break, amid heavy snow in Yongji, Shanxi province. [Photo by Liu Baocheng/For China Daily]

Passengers queue up to board the train at Guiyangbei Railway Station in Guiyang, Southwest China's Guizhou province, on Feb 10, 2019. [Photo/Xinhua]

Passengers are seen on platform waiting for a train at Zhengzhoudong Railway Station in Zhengzhou, Central China's Henan province, on Feb 10, 2019. [Photo/Xinhua]

Passengers check in at Zhengzhoudong Railway Station in Zhengzhou, Central China's Henan province, on Feb 10, 2019.[Photo/Xinhua]