it seems there is no direct bus. Moreover, there is no subway in Chengdu.

So you can take a taxi. It costs about 60 yuan (about 7-8 US dollars). Or you can take the bus and change at exchange stop.

you can take the bus No.303 or No.304.
the passengers and busman can tell you where to change the bus and the number. Please prepare a pen and a notebook for writing and communicating.