Wing Chun sand bag is usually held against a wall. The wall bag is divided in to three sections vertically. The upper section is used to practice straight punch, elbow, palm strikes, and cutting hand. The middle section is used to practice low palm strikes. The lowest section is used to practice kicking techniques.
Wing Chun wall bag practice is primarily for power. When starting wall bag practice first begin with light strikes and increase power over time. Also take care not to hurt the bones and joints. When generating power use hip and stance together. Power comes from the rooting principle of proper stance.