中国的“春运”被誉为规模最大的、周期性的人类大迁徙。2015年春运从2月4日开始，至3月15日结束，共计40天。官方预计，今年春运期间全国旅客发送量将达到28.07亿人次，日均达到7000万人次。

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Transport authorities have taken contingency measures to ensure the smooth movement of people during the world's largest annual migration that started on Wednesday,but train tickets are still hard to get because of the gap between supply and demand.

A record 2.8 billion trips are expected to be made during this year's Spring Festival travel rush,which lasts for 40 days from Feb 4 to March 15,as Chinese return home for family reunions during the Spring Festival holiday.

Chinese have traditionally favored road and train transportation,especially trains,for their safety and lower prices.