Need help in transportation information from Capital Airport to Swissotel Beijing around 2 am

Hi,

Me and my boyfriend are leaving to Beijing on 23rd of Dec, we'll be arriving there around 2 am then head to Swissotel Beijing at Chaoyangmen North Street, Dongcheng District.

Can anyone help to suggest what kind of transportation we can get at that time, are busses still available at that time, or taxi is the only transportation we can get?