Around 4,000 years ago a turtle appeared in the river Lo and on its shell were nine clusters of circular markings. The numbers were arranged in such a way that each line added up to 15. The markings on the back of the turtle were in fact a magic square. This square is used as a basis for all flying star feng shui and this turtle is particularly auspicious. The earth energy represented in this print suggests it would be well placed in the north-east, southwest, west and northwestern walls. It also offers strength and support if placed behind you at your desk.