In reading several books, they talk about using compass directions and using the Ba-Gua. For instance, the recommendation is to have a small fountain in the South-East corner of your office. Is that the compass South-east or is it the South-east determined by overlaying the Ba-Gua on the floor plan of your office? The South-East on the compass may not be the same South-East for the Ba-Gua. Can you clarify, please? Thank you.