One of the confusing issues surrounding Tan-sau and Fook-sau for most beginners concerns what each are really for and how they are used.
Tan-sau, or “Bridge-On arm”, sees the palm facing upward and the elbow slightly inward. With this angle, the arm can project forward by slicing into the incoming punch. Tan-sau’s main purpose is defense against a straight punch, but some will train it as a defense against hook punches.
Straightline and hook trajectories have different angles of attack, which in turn cause different muscles to be used for creating the most force when employing them. By contrast, defense against these two punches would see difference musculature being used, too.
Because of the angle of attack with a straightline punch, Tan-sau’s elbow can project the arm directly forward by using the wrist to “slice” into the attack. The fingers are pointed towards the shoulder of that attacking arm, which keeps the necessary angle (thereby affording a proper defense). When it comes to a hooking punch, though, Tan-sau’s elbow and forearm angle is somewhat insufficient.
Fook-sau, or “Bridge-On arm”, has two uses. The first is the position seen during the slow cycle of Siu-Nim-Tau section 1 and will not used for this discussion. Instead, we will focus on its second position.
The second position is with the palm directly downward and the elbow outward a bit. With this arm position, the angle is such that a strong connection is established from wrist-to-elbow-to-shoulder. This connection then allows the body to play a more prominent role by “wedging” into the hooking attack.
Should Tan-sau be used for countering a hook punch, the palm facing upwards sees the elbow moving slightly inward. The angle of the forearm changes to the point that it requires a great deal of strength to actually halt a real hook.
Those that train Tan-sau to defend against a real hook punch will see one of two things happening:
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Tan-sau will collapse because the speed and power of the hook will simply overcome it, or
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Tan-sau must be reinforced with Wu-sau, a common action we are now seeing in some circles
The problem with point 1 is that the angle of the attack is overcoming the angle of the defense. Therefore, Tan-sau would not be an appropriate defense to begin with. And the problem with point 2 is that the practitioner is now using two hands to defend against one of the opponent’s, thereby breaching a basic Wing Chun tenet.
The correct action would be that rather than using Tan-sau for hooking attacks, Fook-sau is much more capable of wedging into even the most powerful of hooks. No reinforcement is needed, either, since the wrist-to-shoulder connection allows for giving up of our force and absorbing the attack (while simultaneously providing enough strength to withstand the original force to begin with).
Take the time to experiment with real punches that you would encounter and you will quickly see the angles that our defenses were meant to counter. Things will sometimes work in class that will not work in real life because not enough speed and strength is used as we would encounter for real. But when you work things with “real” power and “real” speed? It is a lesson that will go a long, long way for seeing what will really work.









