Here is a video of a Tai Chi practitioner demonstrating applications for the White Crane Spreads Its Wings posture. This posture is found in the Pinan Yondan form, and is often viewed as a transitioning movement into some sort of subsequent offensive or defensive technique. In my view, the posture tends to be a clearing of a limb (with the lower hand), while the upper hand performs some sort of slapping or raking movement to a vulnerable area of the opponent's face.
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