Dong Chenggui and his wife take their granddaughter to board the train at Hanzhong Railway Station in Hanzhong, northwest China's Shaanxi Province, Jan. 21, 2019. Hundreds of millions of Chinese return to their hometowns every year for the Lunar New Year, or Spring Festival, family reunions, thus forming the Spring Festival travel rush. The Spring Festival will begin on Feb. 5 this year. The 40-day 2019 Spring Festival travel rush started on Jan. 21, with 3 billion trips expected to be made. (Xinhua/Tao Ming)