The pattern of numbers on the giant tortoise in any given direction i.e. horizontal, vertical or diagonal all add up to a total of 15. This is equal to the 15 days in each of the 24 cycles of the Chinese solar year.  The 24 cycles make up a full year

The significance of the  arrangements of the numbers on the giant tortoise feature prominently in the following:

1. The Chinese system of time dimensions also takes into account the number Nine (9). Here, time is divided into 9 ages.  Under Flying Star theory, each period lasts 20 years: Three 20 year ages make up one period. A full cycle  consists of a total of 180 years. Each period is assigned a number, from one to nine.

2. The Luo Shu Square with its 3 x 3 grid or nine sectors is called The Flying Star Theory (Xuan Kong Fei Xing). The Luo Shu Square helps the Feng Shui practitioner to analyze a site, a house, a flat (apartment) and/or an office space or building. The time dimension allows Feng Shui practitioners to decipher when the suitable timings to make changes to the site, the home or the interior decoration.

A typical 9-grid Luo Shu square looks like this:

4    9    2
3    5    7
8    1    6

Notice that in any direction, the sum = 15

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