there are five work areas.

1. Zhangjiakou Works Section of Beijing Railway Bureau: as the railway works management institution in Zhangjiakou area, it is responsible for managing and maintaining the railway lines and facilities in this area.

2. Kongjiazhuang Line Workshop in Zhangjiakou Works Section: Kongjiazhuang Line Workshop is a workshop under Zhangjiakou Works Section, which is responsible for managing and maintaining the railway facilities of Kongjiazhuang Line.

3. Shacheng Line Workshop of Zhangjiakou Works Section of Beijing Railway Bureau: Shacheng Line Workshop is another workshop under Zhangjiakou Works Section, which is responsible for managing and maintaining the railway facilities of Shacheng Line.

4. Yangyuan Road Maintenance Work Area of Datong Works Section: Yangyuan Road Maintenance Work Area of Datong Works Section is a road maintenance work area of Zhangjiakou Works Section, which is responsible for managing and maintaining the railway road maintenance work in Yangyuan area.

5. Shayi Line Work Area of Shacheng Line Workshop in Zhangjiakou Works Section: Shayi Line Work Area is a work area under Shacheng Line Workshop in Zhangjiakou Works Section, which is responsible for managing and maintaining Shayi Line on Shacheng Line.