These services are the only regular traffic on the unelectrified line east of Shacheng and are operated using diesel multiple units. S2 services continue from Badaling over the short single-track Kangzhuang–Yanqing railway (Kangyan railway) to .
The primary transportation on this unpowered track lies east of Shacheng and is carried out with diesel-powered trains. S2 services proceed from Badaling along a brief, one-track route to .