Leshan- dazu by bus

I'll be in Chengdu around october 15th, and Leshan around 18th. I found bus shedule from Dazu to Leshan, but not from Leshan to dazu. I read that i could take a bus from Lenshan to Zigong, then another bus from Zigong to Dazu, but i've no idea about how long it takes. Is there a direct bus (Leshan-dazu) ?Maybe the easier way is to come back to Chengdu or Chonqing, where i could find buses or trains to Dazu ?
Thanks