1 / 4   Chinese railway workers in the southwestern Chinese city of Chongqing have inspected more than 200 locomotives for the country’s largest travel rush, known as Chunyun or the Spring Festival travel rush. /VCG Photo

2 / 4   This year’s Chunyun will start on January 21 and ends on March 1 with an estimated 400 million passengers traveling via trains. /VCG Photo

3 / 4   To ensure the safe transportation of passengers and freights, workers need to finish the checks, including brakes and power supply systems and running gears. /VCG Photo

4 / 4   The railway group also introduced a wait list for people who couldn't buy tickets during the Spring Festival. /VCG Photo