Shuttle buses will be running to the festival from Beijing. These will be departing from Beijing Agricultural Exhibition Hall Subway Station. These will depart at 12pm, 12:30pm and 1pm on the Saturday, and 12:30pm and 1pm on the Sunday.
As you might expect, there will be no ATMs on site. So it is advised you bring cash (although Alipay and WeChat payments will also be accepted).