Floods have always been a major problem that plagued ancient ancestors. During the Yao and Shun period, in order to control the floods well, Dayu was enabled, which led to the story of " Dayu controlling floods" that we later knew. When Dayu was at the beginning of the flood control, when he passed by Luoshui, a revelation from heaven came. A divine turtle was carrying a mysterious picture and floated out of Luoshui. This is Luoshu

The divine turtle carries Luoshu
If the dots in the Luoshu are represented by numbers, you will find that the sum of the three numbers on each line of the vertical and horizontal oblique line of is equal to 15. If you connect it in the order of numbers in the Luoshu, a folded eight characters will appear.

Luoshu and Nine Palaces
0 Luoshu's 9 Palaces
The Nine Palaces in Luoshu also reflect the changes in the light of the earth under the sun's illumination of the sun in one year and one day:
- In the morning, the sun rises from the east, and at this time there is " three-point yang energy " and the earth has seven-point yin energy (3);
- When the sun rises to the southeast, the yang energy increases and the yin energy retreats, so there are " four-point Yin Qi " and six-point Yang Qi (4);
- When the sun is in the south at noon, the yang energy is the most prosperous, " Yang Qi nine-point ", and the yin energy is one minute (9);
- The sun reaches the southwest, the yin energy is reborn, and the yang energy gradually disappears, " Yin Qi Two minutes ", 8 minutes of yang energy (2);
- turns westward at the beginning of the day, " yang energy seven minutes ", 3 minutes of yin energy (7);
- In the evening, yin energy rises, at this time, " yin energy six minutes ", 4 minutes of yang energy (6);
- wait until midnight, yin energy is the most prosperous, " yang energy one minute " (1 );
- Before dawn, " Yin Qi Eight Fen ", Yang Qi Two Fen (8)

Nine Palaces Bagua
Luoshu's unique Nine Palace structure has also become an important basis for deducing numerology ( Ziwei Doushu ) and divination ( Qimen Dunjia ).

River map and Luoshu
The innate Bagua developed according to the River map represents the way of heaven, and the acquired Bagua developed according to the Luoshu represents the way of humanity and also explains the laws of development from nature to the human world. The innate Bagua is the body, and the acquired Bagua is the use of .