The core principles of Wing Chun can be summarised as: using efficiency of motion, maintaining relaxation, attacking while defending and employing optimum angles so as to avoid force against force.
Stance, structure & balance
A correct Wing Chun stance is like bamboo, firm but flexible, rooted but yielding. Using a solid stance and structure enables the practitioner to deflect and control external forces.
Performing techniques in a relaxed manner, is fundamental to Wing Chun as it increases striking speed, saves energy and enables the practitioner to adapt quickly to changing circumstances.
Wing Chun training focuses on effective positioning and use of structure to control and strike along the most direct and central line between the practitioner and assailant.