YINCHUAN - Thirty-six km accounts for only a very small fraction of China's over 130,000 km-long railway lines, however, the short distance has separated a railway police couple for more than three years.

Gou Fawei and Luo Yakun, the husband and wife, have worked at two different railway police stations in northwest China's Ningxia Hui Autonomous Region since August 2015.

Gou with the police station of Liwang Railway Station in Haiyuan County patrols the railway line on his workdays to ensure the safety of the passing trains, whereas, Luo works at the police station of Tongxin Railway Station, which is 36 km away in neighboring Tongxin County.