Passengers walk to board the train 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 Thursday, 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. (Xinhua/Xie Jianfei)
