Passengers check in at the Changzhou Railway Station in Changzhou, east China's Jiangsu Province, Feb. 21, 2018. On the last day of the Spring Festival holiday, China greets a travel peak for returning to workplace. (Xinhua/Chen Wei)

Passengers queue to take a train at the Jiujiang Railway Station in Jiujiang, east China's Jiangxi Province, Feb. 21, 2018. On the last day of the Spring Festival holiday, China greets a travel peak for returning to workplace. (Xinhua/Hu Guolin)

Passengers walk out of the Shenyang North Railway Station in Shenyang, capital of northeast China's Liaoning Province, Feb. 21, 2018. On the last day of the Spring Festival holiday, China greets a travel peak for returning to workplace. (Xinhua/Yang Qing)

Cars run on a highway in Guangzhou, south China's Guangdong Province, Feb. 21, 2018. On the last day of the Spring Festival holiday, China greets a travel peak for returning to workplace. (Xinhua/Lu Hanxin)

Passengers arrive at the Beijing South Railway Station in Beijing, capital of China, Feb. 21, 2018. On the last day of the Spring Festival holiday, China greets a travel peak for returning to workplace. (Xinhua/Xing Guangli)