China Railway Corp, the rail network operator, started on Sunday to sell train tickets for next year's 40-day Spring Festival travel peak.

Passengers can book tickets for trains that operate on Feb 4 and 5, the first two days of the 2015 travel rush, which runs from Feb 4 until March 16.

Traditionally, Chinese people return home and spend Spring Festival, the most important Chinese feast day, with their families, and this creates an annual travel rush that is one of the world's largest regular human migrations. Spring Festival 2015 begins on Feb 19.