My family of 4 planning to Chengdu and surrounding area around 20 of june 2016.

Hi, you are suggested to stay two nights in Chengdu for a good visit. Experience them all but Jiuzhaigou. As you know, it is far and you have to spare extra two to three days to explore its beauty. It is generally easy to go to the valley. At Xinnanmen and Chadianzi Bus Stations, there are buses (most leave in the early morning) to the valley directly and it takes around 9h.

Thanks for your reply Linda, I just have studied a lot of information regarding this trip and make following itinerary. Kindly give advise to have more efficient time.
Day 1: arrive Chengdu ( unknown time of arrival yet ).
Day 2 : visit panda base. Rest of time will be used for other sight seeing activities.
DAY 3: To jiu zhai guo by bus.
Day 4 : enter jiu zhai guo valley.
Day 5: to huang long then back to chengdu.
Day 6: to leshan n emeishan by high speed train .
Day 7: return to chengdu.
Day 8: back to Indonesia.
Note: the rest of time will be used to visit wuhou temple, jinli street, chunxi road, wide n narrow alley, sichuan museum.

Question:
1. If the itinerary efficient?
2. What kind of transportation to take from jiu zhai gou to huanglong then back to chengdu, is it possibble or we should stay one at some where else?
3. Should we stay 1 night for emeishan?
4. We will arrive arround 20 of june 2016. What kind of clothing we should wear / bring?
5. Kindlly advise detail expenses if you don't mind. We are a family of four.
Thank you very much, Linda.