how much for a taxi ride during the night

Hello,
we land at the Xi'an airport at 1:30 am, so I presume that our only option is taking a Shuttel Bus No 1 to Xishaomen and then taking a taxi to our hotel.

Thus, I would like to ask you, how much should this night taxi ride cost, presuming that we would go from Xishaomen to Ziqiang West Road, Lianhu?

Thank you in adcance,
Marek