'Step up to seven star' in Qigong sense refers to seven Qi-input points in the body. The locations are: one on top of head, two on each shoulders, two near the waist lines and two back of the hips. Please be aware to do that it must be done without any tension.
In fighting aspects there are many applications: these could be devastating strikes to the ST9 points. ST9 points is 'dimmak' points; slap bang in front of the neck, parallel to one's adam's apple (it's there even if you are a woman). Literally translated it is STOMACH 9, and no it has got nothing to do with stomach.There are also elbows strikes in there etc, your choice based on demand.