trains from Beijing to Xian accessible with wheelchair?

The stations are accessible with wheelchair. If you need help, you can ask the station staff. Usually high speed rides have wheelchair access carriage. YOu may board from there with the help of staff ar platform. After boarding, you can go for your carriage or to see if the steward can make an adjustment for you. If you refers to the slow types, you would need the staff's help for boarding and alright. I used to see a place for wheelchair in one of a soft sleeper carriage, not sure about hard sleeper carriage.