Engineers hard at work ensuring the safe running of bullet trains during Chunyun

Engineers inspect a Fuxing bullet train to help ensure its safe and reliable operation during the Spring Festival travel rush, known as the Chunyun, at a workshop in Beijing on February 2, 2018. Nearly three billion trips are expected to be made during the 2018 Spring Festival travel rush between February 1 and March 12. [Photo: China Plus/Li Jin, Li Lin]