Where can we book a mini van to ferry 5 of us to Badaling and maybe drop by Ming Tomb and then back to Sunworld Hotel. Because there is a 84 years old senoir citizen in our group, it is not convenient for her to walk 15 to 25 minutes from bus or train station to the Great Wall entrance or ticketing booth. I was told bus No.919 stop very near to the PULLEY which we intend to use to bring her up to the Wall. Tks.