How much is cost of transfer from Xian airport to hotel in Renmin Square, around midnight for 7 pax

Generally, the shuttle bus Zhonglou Line will still be in operation then. If you can catch that, the shuttle bus fare is CNY26 per person. Upon getting off at Zhonglou (Bell Tower), your hotel will be around 1.5km away. Then you need two taxis and it costs CNY8/taxi.

For your convenience, you can also book the pick-up service in advance to your hotel directly at that time. The fee may be CNY800-1,000.