Pretty nice start. Would be interesting to see how you would tackle this Landscape. I tried to do a bit in Lijiang but it didn't do the real thing justice at all.
I actually had the issue that I felt it was starting to look too much like an inferior knockoff of Lijang. I might come back to this on a smaller scale sometime in the future.
You should finish this sometime in the future. Zhangjiajie is one of the most beautiful locations in the world and I'm intrigued.