Transportation from Capital Airport to Shatan Hotel, Dongcheng district

Well, I'm afraid the subway cannot take you from the airport to your hotel directly. Anyway, as you wanna use subway, here is my suggestion:
You can take Airport Express Train to Dongzhimen first. Then at Dongzhimen MTR Station, you can transfer to subway line 2 to Jianguomen Station, where you need to transfer to subway line 1 and get off at Wangfujing Station. Then it is about 5min driving distance from your hotel.

I know an easier way: you can take shuttle bus line 2 at the airport to Xidan first. Then a taxi can take you to your hotel in 10-15min.

Thank you very much.