Hi, it will take about 1 hour and RMB100.00 to take a taxi from the airport to the Days Inn Forbidden Hotel. All the taxi drivers in Beijing are certificated. Or if you do not want to take a taxi, you could take the airport shuttle bus line 1 and get off at the Beidayao(Guomao) station, where you need to change to Subway Line 1 and get off at Wangfujing station. After a short walk, you will find your hotel.