1. Stimulate the nervous system: Wang Yi of Crab stimulates the nerve endings inside the human body through electrodes, promoting the activity of the nervous system, thus regulating the body function and relieving discomfort symptoms such as pain.

2. Stimulate muscles: Wang Yi stimulates human muscles through electrodes to promote muscle contraction and relaxation, thereby enhancing muscle strength and flexibility and relieving muscle fatigue and stiffness.

3. Stimulate acupoints: Wang Yi of Crab stimulates human acupoints through electrodes, thus regulating blood circulation inside the human body and promoting health.