Huanglong/Jiuzhaigou/Moniguo Valley

Hi,
I will be arrived from Chengdu using bus and there will be 3 of us travelling together.
Planned to take flight to go to Xian after the visit and I can spend 3 - 4 days in this area.
Could you please advise which one should I visit first?
We want to explore Jiuzhai Valley for one full day for sure.
Is it better to have route like this?
- Day 1: Bus from Chengdu directly to Jiuzhai Valley (spend one night)
- Day 2: Explore Jiuzhai Valley for one full day (transfer to HL at night or in the morning?)
- Day 3: Stay around HL and visit the scenic area
- Day 4: Visit Monigou Valley
- Day 5: Flight to Xian