Chi Gung is for building up your Chi, the energy you have to live your life the way you want to, or to use in practicing Shiatsu on others.
Shibashi is a style of Chi Gung which Sally Ibbotson teaches. This video blog is by Sally, and I like this phrase:
'The mind's in the palms..where your attention goes, there goes the energy and Chi, and as it's magnetic, it picks up more Chi from your surroundings.'
Sally Ibbotson