Can the head end of the Lanju Lan section passenger train be changed to Xi'an?

Lanju Lan section passenger trains will change heads in Xi'an. Lanzhou Railway Bureau has two passenger sections, namely Lanzhou Passenger Section and Yinchuan Passenger Section. Since Lanzhou to Yinchuan does not pass through Xi'an, the locomotive of the Lanzhou section passenger train of Lanzhou needs to be changed when heading to Xi'an to ensure that passengers can be sent to their destination.