As already explained, the Yang Sang refers to circular movement and it is a concept which deals with the co-existence aspect of the subject and object elements.
Circular movement is a necessary aspect and condition for both the subject and object to co-exist.
There can be neither the rotation of an object without a subject nor the existence of a subject without an object revolving around it. On the contrary, the existing form means the form or condition which the subject and object respectively have as individual truth bodies. Prior to G-T action, the subject and object have to possess conditions and forms as individual truth bodies and existing beings. All these conditions are necessary forms for the male and the female to exist as bridegroom and bride. This G-T action is the very living Yang Sang of the couple.