Getting from Airport to Daxue Rd (also Q about Qingdao Railway Station)

Hi all,

If I need to get from the airport to Daxue Rd near Signal Mountain Park and the Jiangsu Road Residential District, which buses/metro would you recommend? I suppose geographically that's considered south central Qingdao.

And, about how long might it take for someone to walk from that same area over to the nearby railway station to the West? I need to meet someone there later the same day after I arrive. I'm thinking I'll just walk it.

Thanks in advance.