Day 1: airport pick up and Huanglong( 3500-4200 meters)
airport pick up, then drive to Huanglong about 1 hour.
Most people will take the cable car inside Huanglong park, because the altitude is already high enough, and the hiking will make you feel very tired. some very strong people can walk 3 hours to the top, others walk down from top need 3 hours, very few people can walk up.
afernoon or evening drive to Jiuzhaigou

Day 2:  Jiuzhaigou 2000-3600 meters.
Jiuzhaigou one day.first day you take the sightseeing bus at the entrance. inside the park you can choose to walk , or you can choose to take the bus stop by stop.

Day 3: airport drop off.