MMA fans just don't understand Kung Fu. It is an umbrella word for Chinese martial arts. It seems like most people equate Kung Fu with flashy flips, kicks and other impractical acrobatics.
There are many styles of Kung Fu, most have practical self defense applications, yet these techniques are most likely illegal in sport fighting. China developed a sport fighting style that is very powerful and a great base for MMA. This style is called Sanda, or Sanshou. The rules allow kicks, punches, elbows, knees, and takedowns.
Some famous Sanda fighters include Liu Hai Long:
Bao Li Gao:
Now we might add currently undefeated Strikeforce fighter Lorenz Larkin. He only claims Kung Fu as his fighting style, but what we see in his fights are the many techniques of Sanda. He displayed the power of Kung Fu against his opponent, Scott Lighty, an experienced K-1 fighter, fighting out of the famed Muay Thai camp, Fairtex.