Hello, It sounds like an exciting adventure to explore China's natural beauty! Here are some essential travel tips for Huangshan, Zhangjiajie, and Jiuzhaigou.

Best Time to Visit:
The best time to visit these destinations is from March to November. Specifically, for Huangshan, it's good all year round, but usually April-June and September-November are the best. For Zhangjiajie, the best months are April to October, try to avoid weekends or Chinese public holidays because of crowds. Jiuzhaigou is splendid from spring to autumn, especially in autumn where the leaves change colors.

Route and Accessibility:
For all these destinations, you can easily reach by a combination of flight and bus ride. From major cities like Beijing, Shanghai, or Chengdu there are daily flights to Huangshan city, Zhangjiajie city, and Jiuzhaigou. From there, you can take a bus or hire a car to reach these mountainous areas.

Accommodation and Booking:
Huangshan features several hostels, hotels, and guesthouses of varying prices. For Zhangjiajie and Jiuzhaigou, there are accommodations of all grades near the scenic areas. Try to book earlier for better prices and availability, especially during the tourist season.

Clothing and Essentials:
Pack layered clothing as the weather can suddenly change especially in the mountains. Rain gear, sun protection, sturdy shoes for walking, and some warm clothing for the night are important. Don't forget your camera for the breathtaking views.

Health and Safety:
Stay hydrated and wear appropriate clothing for the weather conditions. Follow marked trails and be cautious about slippery slopes. If you go trekking alone, let someone know about your plans. Have travel insurance in case of emergencies.

Local Etiquette and Respect:
Chinese customs value respect for the environment, so always dispose of litter properly. Take care not to disturb the natural surroundings and wildlife. Respect local customs and traditions.