My classmates and I are going to travel from Wuhan to Sichuan on May 20th. We want to go to Chengdu, Jiuzhaigou, Huanglong, Emei Mountain, Leshan Giant Buddha and Dujiangyan-Qingcheng Mountain.

Wuhan-Chongqing-Jiuzhaigou-Huanglong-Dujiangyan-Qingcheng Mountain-Emei Mountain-Leshan-Chengdu-Wuhan. I think this is a better route. Your time is too short, not enough at all. If you go by train, you need to choose two places at most, and they are close, such as Jiuzhaigou+Huanglong, Qingcheng Mountain+Dujiangyan, or Emei Mountain+Leshan. Only one of the three combinations can go. If you fly back and forth, you can choose two combinations. But the meeting was in a hurry.