How I can get the Airport Busline no. 1 tickets to transport me to the Hongquiao airport?

I´ll be arriving at 06:00 am to the Pudong aiport, and then I need to move to the Hongquiao airport. How I can get the Airport Busline no. 1 tickets to trasport me to the Hongquiao airport? I need to pay the driver in cash or the tickets are buy inside some place of the airport? Can I use my credit card?