Kung-fu is the use of special skills
Bruce Lee Documentary:
In theory it is simple there are not only physical movements to do but in kung-Fu the mind must walk in unison with the body to achieve true concentration kung-Fu is a way of life not merely fighting its purpose is not to destroy.
It is philosophy a vital part of Taoism and Buddhism which is a Chinese philosophy based on the writings of Lao-tzu ( fl. 6th century BC ), advocating humility and religious piety.
One branch of kung-Fu is strong and hard the other is weak and soft, the first aims at strength and speed while the other at thinking and the body.
Traditional kung-Fu movements are groups according to the section of the body you want to attack these groups are good in practice but a real fight is different , your opponent will be constantly moving to avoid you, you must be flexible, remain alert and remember he is alive and moving at all times so all of your movements must be simple and direct .
What is direct mean?
Direct mean not wasting time, doing what you got to do, you know without having to stop, for example if something you dropped you will move to catch it or move around it and then catch it or miss it, anybody will do the most direct move and catch it even before it drops.
You'll have to make a direct move when you attack an opponent and don't forget though what you are doing the answer is up in your brain.