I would like to spend 2 days in Zhangjiajie. May I know how can I get from Changshu to ZJJ?

Do you refer to the Changshu city in Jiangsu province? If so, you can take a bus to Shanghai. Then fly from Shanghai to ZJJ. The take shuttle bus to local Bus Station, where there are direct buses to the park scenic area.

As I know, there are hotels in the scenic areas, which would be very convenient for your trip.

He probably means 长沙(changsha) in Hunan. The easiest way is to take train from the main station where they have both trains and hight speed buses (~4-5 hours).

Thanks. Your guess was right. It is Changshu in Jiangsu.

I will consider your advice but still quite worry about the multiple change of transportation.