I stay at apartment Zhong Mao Plaza, Nanshaomen, Beilin District, South Gate, Xian.

I need your help regarding airport shuttle bus direction.
And how to go there from airport?
Which shuttle bus I must take from airport and which bus stop the nearest i drop off?
And how many public transport(bus or train) and cost(if you know) to reach that apartment area?

thanks you in advance