Dear calligraphy prawns, help me see what this word is.

This is the signature. You left out the text.

Sentences of the Book of Changes, by Geng, Lian and Hong Haiyi.

The seal is Li Honghai's. I can't read the following Zhu Wen clearly. It should be a word "Xin".

"Kung Fu" is too far away. From his other works, we can also see that it should be Mountain Man.