Thousands of passengers carrying their belongings walking out of a railway station as they return to work after the Lunar New Year holidays in Wuhan, central China's Hubei province on Feb. 9. The Lunar New Year holiday is the most important annual celebration in China, when the nation largely shuts down as families gather together for reunions and feasts. More than 2.5 billion passenger trips by air, rail, bus or sea will be taken around the holiday, the government says, as China's army of migrant workers, business people and students return home for the festivities.