From Shanghai to Jiuzhaigou/Huanglong

Hello

My family will be traveling to Shangai in July. We wonder how long time it takes to fly from Shanghai to Jiuzhaigou? Is it possible to fly to Jiuzhaigou directly from Shanghai or do we have to transfer in Chengdu? How many days and nights do we need to stay in Jiuzhaigou if we wish to see both Jiuzhaigou and Huanglong?

Is it far away from the panda reservoir? How long time does it take to get to the pandas from Jiuzhaigou? What is the best way to travel?

Is it expensive to travel in Jiuzhaigou?

thank you so much