A staff member works at Harbin Railway Station in Harbin, Northeast China's Heilongjiang province, Jan 28, 2021. China kicked off its annual travel rush, known as "chunyun," on Jan 28, with hundreds of millions starting to head home for the Spring Festival that falls on Feb 12 this year. Known as the world's largest annual human migration, the travel rush lasts 40 days from Jan 28 to March 8 this year. [Photo/Xinhua]
A policeman patrols at Harbin Railway Station in Harbin, Northeast China's Heilongjiang province, Jan 28, 2021. [Photo/Xinhua]
Staff members work at Harbin Railway Station in Harbin, Northeast China's Heilongjiang province, Jan 28, 2021. [Photo/Xinhua]
A staff member works at Guiyang North Railway Station in Guiyang city, Southwest China's Guizhou province, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check a train at Xi'an Railway Station, in Xi'an, Northwest China's Shaanxi province, Jan 28, 2021. [Photo/Xinhua]
Policeman Zhou Qiang (L) conducts security check at Hongqiao Railway Station in Shanghai, East China, Jan 28, 2021. [Photo/Xinhua]
A policeman patrols with a police dog at the waiting hall of Hongqiao Railway Station in Shanghai, East China, Jan 28, 2021. [Photo/Xinhua]
Policemen patrol at the waiting hall of Hongqiao Railway Station in Shanghai, East China, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check railway tracks in Liupanshui, Southwest China's Guizhou province, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check railway tracks in Liupanshui, Southwest China's Guizhou province, Jan 28, 2021. [Photo/Xinhua]
Maintenance worker Liu Wei checks a railway track in Liupanshui, Southwest China's Guizhou province, Jan 28, 2021. [Photo/Xinhua]
A staff member (R) guides a passenger at Shapingba Railway Station in Chongqing, Southwest China, Jan 28, 2021. [Photo/Xinhua]
A staff member monitors the body temperature check of passengers at Hohhot East Railway Station in Hohhot, North China's Inner Mongolia autonomous region, Jan 28, 2021. [Photo/Xinhua]
A policeman conducts security check on a train in Beijing, capital of China, Jan 28, 2021. [Photo/Xinhua]
Policemen stand guard at Beijing Railway Station in Beijing, capital of China, Jan 28, 2021. [Photo/Xinhua]
A staff member explains the knowledge of travel safety at Beijing West Railway Station in Beijing, capital of China, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check railway tracks in North China's Tianjin, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check railway tracks in North China's Tianjin, Jan 28, 2021. [Photo/Xinhua]
Maintenance workers check railway tracks in North China's Tianjin, Jan 28, 2021. [Photo/Xinhua]
