Passengers wait for departure aboard train No. K4051, bound for Nantong in east China's Jiangsu Province, at Beijing Railway Station in Beijing, capital of China, early on Jan. 21, 2019. Monday marks the start of China's 2019 Spring Festival travel rush. The country will see a soaring passenger flow over a 40-day period when most people travel home for family reunion. (Xinhua/Xing Guangli)