Thanks for your comment and the compliment. Yes, it was my first time in China seeing this kind of project being used in a national park. People can be careless and this helps to keep the environment clean so everyone can enjoy it
Easiest way is to fly from Chengdu to Daocheng airport. From the airport you can either rent a car, or take a 3 hour 400-500 RMB, taxi/uber. As far as I know there aren't any busses that'll take you. Easiest would be to book a private tour that'll pick you up from the airport and drive you there and to hotel and back again to the airport