Maintaining contact and pressure.
Subduing hand used to control an opponent’s arm. Wu Sau: Protective "guarding hand" held at the centerline. 3. Basic Striking & Footwork WING CHUN TRAINING DVD DISC 1 By Wulber
If "Wulber" refers to a specific local instructor or a less common lineage, the disc likely follows this structure but may include unique variations in hand positioning or specific tactical explanations characteristic of their style. Wing Chun Vol-1,2,3 DVD Set : Samuel Kwok, Val Mijailovic Maintaining contact and pressure