Chinese paramilitary police stand guard at Beijing West Railway Station in Beijing, Wednesday, Jan. 18, 2023. China in December lifted its strict "zero-COVID" policy, letting loose a wave of pent-up travel desire, particularly around China's most important time for family gatherings, referred to in China as the Spring Festival, that may be the only time in the year when urban workers return to their hometowns. (AP Photo/Mark Schiefelbein)