Is there any bus from Huanglong to Xian? Huanglong & Jiuzhaigou is that good in June?

June is fine, although it has more rain. The temerpature is fine, a bit cool in the early morning and at night, so, still need to prepare a warm clothes outside T-shirt. There isn't any bus from Huanglong or Jiuzhaigou to Xian, but there is direct flight. If you do not want to take flight, you have to go back to Chengdu first and then take train to Xian. I suggest you can tour by yourself, the precondition is that you can handle the hotel, bus and train tickets.