Zhou Jie is a railway technician worker of China Railway Chengdu Group Corporation, in charge of the railway inspection in Kaili city, Guizhou province.

In chilly spring, a group of young railway staff of China Railway Chengdu Group Corporation conduct railway track inspection in Kaili city, Guizhou province.

A staff member carefully inspects the high-speed train tracks in Kaili city, Guizhou province.

Railway staff use high speed railway detector to inspect railway tracks in Kaili city, Guizhou province.

These young railway staff usually walk eight hours a day to detect and repair the damage of the train tracks in Kaili city, Guizhou province.

These young railway staff usually walk eight hours a day to detect and repair the damage of train tracks in Kaili city, Guizhou province.

Zhou Jie, the group leader, says track inspection should be paid more attention in case of trouble under different circumstances.

It's a big challenge for these railway staff to walk more than eight hours carrying nearly 50 kilograms of detectors to inspect about 10 kilometers of railway lines in a day.