The ancient Chinese art of placement, or feng shui, relies on the theory that, like the human body, the earth is crisscrossed by a series of channels, along which flows vital energy, or qi. Practitioners of feng shui believe that the design and position of a building and the way its contents are chosen and arranged can affect the flow of qi, and thus make the building more a auspicious and healthier place to live. If you consult a feng shui practitioner, he or she will take readings with a special compass and asses the rooms of your home using Chinese astrology and the ancient I Ching (Book of Changes). The practitioner may then recommend alterations, such as moving mirrors and other items and rearranging the furnishings. Exponents of feng shui claim such changes may improve psychological and physical wellbeing.