Though a massive crowd is trapped in a single train station, the rest of China is now on the move. Baidu, China's version of Google, has released aninteractive map that tracks movements around the country during this year's annual Spring Festival travel rush. Spring migration lasts for 40 days -- from January 24 to March 3 -- when millions of people travel home for the Lunar New Year. The world's largest annual human migration, some 2.9 billion trips are expected to be made during the period. Read more
