It's 40 days and 40 nights, and a time for friends, family, and the warm comforts of home. China's Spring Festival travel rush, also known as "chunyun," is on now until February 18. The total number of air, rail and other trips is likely to hit three billion during this year's chunyun. So how is it for those that ensure that we all reach our destinations? CGTN introduces you to a female railway worker.