CR200J bullet trains, the newest model of China's Fuxing bullet trains, are seen at a workshop in Southwest China's Chongqing. (Photos: Su Zhigang/chinadaily.com.cn)

Zhou Peng conducts maintenance checks for CR200J bullet trains at a workshop in Southwest China's Chongqing.

Zhou Peng conducts maintenance checks for CR200J bullet trains at a workshop in Southwest China's Chongqing.