70 Years Inherited: Lunch box witnesses China's railway development

Zheng Jiannan is a train driver and whenever he drives out, his wife prepares his meal, puts it in an old-style lunch box and says: "Eat well and be safe.” For train drivers, lunch boxes used to be a must. From 2014 on, meals are delivered to all the front-line staff. It solved the problem of eating on the train for decades.