Peng pai (which is Chinese for "to bounce" or "to jump") is a concept in martial arts that involves using your body's natural springiness to create power in your movements. When you jump, your body automatically compresses and then releases that energy as you jump off the ground. In peng pai, you use that same idea of compression and release to make your strikes and movements more powerful.
So let's say you're throwing a punch. Instead of just throwing your arm forward, you'll first compress your body by bending your knees and sinking your weight down. Then, as you extend your arm, you'll release that energy from your legs and use it to add force to your punch. This makes your punch much stronger than if you were just punching with your arm alone.
Peng pai can be used in many different martial arts styles and techniques, and it can be applied to kicks, throws, and pretty much any movement that involves force. By using peng pai, you can become a stronger and more efficient martial artist, and you can use your body's natural energy to become a better fighter.