Which official taxis can i take from Beijing Airport to Ningxia Hotel and how much does it costs?

If taking a taxi, it may cost you CNY80-90.
To taking the official taxis, you should go to the taxi stands in the airport. Upon your arrival, follow the signs in Englihs to find the the taxi boarding sites.
T1: Outside Gate 1 on F1
T2: Outside Gate 5 to 9 on F1
T3: Please refer to the signs inside the terminal building.