The cultivation of Wudang's secret method of keeping out the cold
I practiced. I didn't know that before. In order to be quiet, I listen to my heartbeat. Both layers have experienced it, but the second layer didn't rely on intention, and when it was practiced to a certain extent, the heartbeat suddenly accelerated, and the blood rushed to all parts of the body like a flood until the fingers and toes felt obvious, and the head didn't feel obvious at that time. I experienced it once recently.