What is the time schedule of buses from Guangyuan to Jiuzhaigou?

Hi, i would like to find out if there is a way to get from Xian to Jiuzhaigou by train and bus without staying overnight in Guanyuan or Jingyou. I plan to take a night train from Xian, that would arrive to Guangyuan just in time to make it for the bus. Do you think this is possible? Do you know the time schedule of the buses from Guangyuan?

Thanks