Maintenance of the "black box" of a train is important for railway safety.
Zou Pei, a young railway signal worker in China's Changsha, has found joy in the seemingly monotonous job.
Produced by Xinhua Global Service■
Maintenance of the "black box" of a train is important for railway safety.
Zou Pei, a young railway signal worker in China's Changsha, has found joy in the seemingly monotonous job.
Produced by Xinhua Global Service■
