For example, the *Su Wen* says that when qi is in rebellion, if the ailment is high, you treat it low; if the ailment is low, you treat it high; and if it's in the middle, you treat it from the sides.
If you've lost a foot, you can still treat it using acupoints on the hands.
Seeing that everyone was still baffled, Chen Yu gave another example: "Take Hill, for instance. He had a sprained ankle, but when I performed acupuncture on him, I started by needling the Yangchi Acupoint on his hand. The reasoning is quite complex and relates to the meridians. I'll explain it to you all in detail when I have more time."
The Yangchi Acupoint is on the Hand Shaoyang Sanjiao Meridian, while the ankle is associated with the Foot Shaoyang Gallbladder Meridian. These are considered meridians of the same name.
