Wang has often spoken of Taiji breathing, or reverse breathing. Taiji breathing is reverse breathing. Normally with an inhale the dantain and diaphragm expand. With Taiji breathing the dantain goes inward with the in breath and expands with breathing out. Breathe in with the ming men and the dantain. Imagine the belly button meeting the spine. When exhaling the ming men area of the spine goes out as does the dantain. The breath goes through the back. The dantain gets warm as the breath moves. Energy fills the dantian .