1 / 4   Photographers turned a train window into a photo frame to document the faces of people traveling home for the Spring Festival holidays in China. /CFP Photo

2 / 4   Railway is the main mode of transport for people heading home for the Spring Festival. /CFP Photo

3 / 4   Each year, around a month before the Spring Festival, people rush to book train tickets online, by phone or line up at ticket offices to guarantee a way back home. /CFP Photo

4 / 4   It is estimated that this year around 356 million passengers will travel by rail in China between January 13 and February 21. /CFP Photo