![](http://www.ecns.cn/hd/2020/01/21/4695a386aad749c4991cb2f612442af7.jpg)
An old style passenger train 7524 from Yinhcuan to Rujigou is seen traveling at a slow speed of 60kmh in Helan Mountain area, Northwest China's Ningxia Hui autonomous region, January 20, 2020. The train has been put into operation since 1972. (Photo: China News Service/ Yang Di)
![](http://www.ecns.cn/hd/2020/01/21/6a58fbb93dc3483cbc870599f96be428.jpg)
An old style passenger train 7524 from Yinhcuan to Rujigou is seen traveling at a slow speed of 60kmh in Helan Mountain area, Northwest China's Ningxia Hui autonomous region, January 20, 2020. The train has been put into operation since 1972. (Photo: China News Service/ Yang Di)
![](http://www.ecns.cn/hd/2020/01/21/a681697d69974ed7af186acbe7225f17.jpg)
An old style passenger train 7524 from Yinhcuan to Rujigou is seen traveling at a slow speed of 60kmh in Helan Mountain area, Northwest China's Ningxia Hui autonomous region, January 20, 2020. The train has been put into operation since 1972. (Photo: China News Service/ Yang Di)
![](http://www.ecns.cn/hd/2020/01/21/a6420d669a2a4f1098c85c1112b1c12e.jpg)
An old style passenger train 7524 from Yinhcuan to Rujigou is seen traveling at a slow speed of 60kmh in Helan Mountain area, Northwest China's Ningxia Hui autonomous region, January 20, 2020. The train has been put into operation since 1972. (Photo: China News Service/ Yang Di)
![](http://www.ecns.cn/hd/2020/01/21/6e1c21bd5bc249f5a5780d098194da54.jpg)
An old style passenger train 7524 from Yinhcuan to Rujigou is seen traveling at a slow speed of 60kmh in Helan Mountain area, Northwest China's Ningxia Hui autonomous region, January 20, 2020. The train has been put into operation since 1972. (Photo: China News Service/ Yang Di)