How do I get to downtown Beijing from airport at midnight?

How will the passengers find bus transport to the Beijing city near Wangfujing ? Does the Airport bus still run at 0100 - 0200am (after midnight) to help arriving passengers travel to the city? This international flight on Jetstar Airways arrives from Singapore to Beijing at 0100 am ( after midnight ) . Please confirm. Thank you so much for your attention. Best regards, Richard