I will arrive at Chengdu Airport and I will have nine hours before my plane will take off again.

I decide to take five hours to go to city for shopping and walking at shopping area of Chunxi Road.
Which is best and short way to go to city?
Can I take airport shuttle bus to nearest subway and then take subway to Chunxi Road. So which bus No. that can I take to the nearest subway station and return to the airport and which subway station should I go to?

Thank you. Thanawit.