Battle through the heavens manhua is based on its original novel of the same name.
There are many differences between the novel and manhua ranging form small personality changes, to how much information is given about certain things. In a nut shell, the Light Novel is a complete version of the story line in the manhua. The manhua has a more humorous take on things, such as the squabbles between Xiao Yan and Yao Lao, which is almost nonexistent in the Light Novel.
You can find links to the Light novel here:
English:Wuxia (Not finished)
Complete English Machine translation: LNMTL