Transportation from Maoxian County to Chengdu

Hi everyone, early Nov'16 we plan to visit Huanglong and then Jiuzhaigou. On the way back from Jiuzhaigou, we wanted to spend a nite in Maoxian county. Early next morning, we like to continue our tour to Mt Qingcheng and Dujiangyan Irr Sys. I dont seemed to find any info on what transport is available to leave Maoxian county as early as possible. Anyone got experience on such route? Thanks