North Section Cable Service of Beijing Badaling Great Wall

May i know if there is discount for foreign senior and child = 7yo for the round trip of the cable car. We have wheelchair and stroller, can we ask permission in entrance of the north section cable to leave it there? By the way, after Badaling Great Wall, we will go to the Badaling Ski Resort, what are your transportation suggestion going there? Thank you very much and appreciated of your help.