Overview
Fook Sau is a controlling hand shape that rests lightly on the opponent’s arm, using sensitivity rather than force. The purpose is not to press down or trap aggressively, but to subdue the line with calm, steady pressure. Fook Sau teaches control, relaxation, and awareness, the ability to feel intention through touch.

Purpose of the Technique
The aim of Fook Sau is to control the opponent’s arm without committing strength. It keeps the elbow in, the wrist alive, and the centreline protected. When pressure comes in, Fook Sau redirects; when the line opens, it transitions instantly into attack. It is one of Wing Chun’s most important tools for reading the opponent’s intent.

Structure & Pressure
A correct Fook Sau has a gently curved wrist, a relaxed forearm, and a forward-facing elbow. The pressure is light, just enough to stay connected. Too much force collapses structure; too little loses contact. The balance teaches discipline, control, and refined touch sensitivity.

Using Fook Sau Under Pressure
Fook Sau adapts to incoming force. If the opponent presses down, it can change to Jum Sau; if they push inward, it can rotate into Bong Sau; if the line opens, it strikes immediately. Fook Sau never fights pressure, it receives, listens, and transforms.

How It Connects to the System
Fook Sau appears throughout Siu Nim Tao, Chi Sau, and Gor Sau. It is the training ground for Ting Lik (listening skill) and teaches how to maintain structure while staying soft. Combined with Tan Sau, Bong Sau, and Wu Sau, it forms the core defensive cycle of Wing Chun.

Common Lessons in Fook Sau

• Stay relaxed and responsive

• Maintain light, consistent pressure

• Keep the elbow in and rooted

• React early when force changes

• Blend smoothly into Jum, Bong, or attack

• Never push, resist, or hold