In Chinese mythology and culture, the Lo Shu Square, also called the Lo Shu Grid or the Nine Halls, is a 3x3 mystical square. At more than two millennia old, it's among the most well-known and historic magic squares. The Lo Shu Square is a numerical grid in which the total of every row, column, and diagonal equals 15, the same number. Nine spaces make up a birth chart grid, with each area designated for a different number. The native's birthdate shall be provided in full, with spaces added. The "Lo-Shu Grid" is the name given to this 3 by 3 magic square (as depicted in picture) that adds magically to "15" when added horizontally, vertically, or diagonally.

A person's complete life pattern, inner qualities, strengths, and weaknesses are all analysed in great detail by the Sacred Square, also known as the Magic Square and the Loshu Grid. It provides patterns and analysis of an individual's mental, emotional, financial, practical, will, and behaviour patterns. The Loshu grid can also display Vastu faults and is linked to the Nine Planets and their vibrations, as well as the Vast or directions and their energies. Since its discovery about 4,000 years ago, it has been practised. It is the fundamental idea and foundation of Flying Star Feng Shui, which is derived from age-old knowledge. It travelled from China to India and then the rest of the world.