2. Flapping frequency: once a day.

3. Beating time: about 3 minutes each time.

4. Flapping method: Location: The liver meridian is located inside the thigh; The gallbladder meridian is located outside the thigh. Operation method: people sit on the bed or sofa, with their calves bent forward, fists clenched with both hands, and knock from the upper thigh to the knee, from top to bottom, parallel inside and outside, with moderate strength. From left to right, knock 4 times on each leg, about 50 times, which takes 3 minutes.